From 9ebac0909de7158d78f23ab26160dc97c48d801e Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Sat, 18 Jul 2026 05:14:39 +0000
Subject: [PATCH 1/2] Add cover skeleton loaders and edition-matched covers

Show a shimmer skeleton while library covers load, then fade images
in for a cleaner grid. Prefer edition-accurate Open Library covers
for key titles such as Python Crash Course 3rd Edition.

Co-authored-by: Muhammad Saim Shafique <contact@saimshafique.com>
---
 scripts/rematch_edition_covers.py  | 205 +++++++++++++++++++++++++++++
 web/components/BookCard.module.css |  40 ++++++
 web/components/BookCard.tsx        |  18 +--
 web/components/BookCover.tsx       |  50 +++++++
 web/data/books.json                |   8 +-
 5 files changed, 302 insertions(+), 19 deletions(-)
 create mode 100644 scripts/rematch_edition_covers.py
 create mode 100644 web/components/BookCover.tsx

diff --git a/scripts/rematch_edition_covers.py b/scripts/rematch_edition_covers.py
new file mode 100644
index 0000000..62542db
--- /dev/null
+++ b/scripts/rematch_edition_covers.py
@@ -0,0 +1,205 @@
+#!/usr/bin/env python3
+"""Prefer Open Library covers that match each book's listed edition."""
+
+from __future__ import annotations
+
+import json
+import re
+import time
+import urllib.parse
+import urllib.request
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+BOOKS_PATH = ROOT / "web" / "data" / "books.json"
+UA = "FreeProgrammingBooksCoverBot/1.1 (edition rematch)"
+COVER_TMPL = "https://covers.openlibrary.org/b/id/{cover_id}-L.jpg"
+MAX_WORKERS = 5
+PAUSE = 0.12
+
+
+def normalize(text: str) -> str:
+    text = text.lower()
+    text = text.replace("c++", "cpp").replace("c#", "csharp")
+    text = text.replace("javascript", "java script").replace("typescript", "type script")
+    text = re.sub(r"[^\w\s]", " ", text)
+    text = re.sub(r"\s+", " ", text).strip()
+    return text.replace("java script", "javascript").replace("type script", "typescript")
+
+
+def edition_number(edition: str) -> str | None:
+    ed = (edition or "").lower()
+    m = re.search(r"(\d+)\s*(st|nd|rd|th)?\s*edition", ed)
+    if m:
+        return m.group(1)
+    m = re.search(r"\b(19|20)\d{2}\b", ed)
+    if m:
+        return m.group(0)
+    return None
+
+
+def http_get_json(url: str) -> dict:
+    req = urllib.request.Request(url, headers={"User-Agent": UA, "Accept": "application/json"})
+    with urllib.request.urlopen(req, timeout=30) as resp:
+        return json.loads(resp.read().decode("utf-8"))
+
+
+def search(title: str, edition: str) -> list[dict]:
+    queries = [title]
+    num = edition_number(edition)
+    if num and "edition" in (edition or "").lower():
+        queries.append(f"{title} {num} edition")
+        queries.append(f"{title} {num}nd edition" if num == "2" else f"{title} {num}th edition")
+        if num == "1":
+            queries.append(f"{title} 1st edition")
+        elif num == "2":
+            queries.append(f"{title} 2nd edition")
+        elif num == "3":
+            queries.append(f"{title} 3rd edition")
+        else:
+            queries.append(f"{title} {num}th edition")
+    core = re.split(r"[:–—|(]", title, maxsplit=1)[0].strip()
+    if core and core not in queries:
+        queries.append(core)
+
+    docs: list[dict] = []
+    seen = set()
+    for q in queries:
+        url = "https://openlibrary.org/search.json?" + urllib.parse.urlencode(
+            {"q": q, "limit": 15}
+        )
+        try:
+            data = http_get_json(url)
+        except Exception:
+            time.sleep(0.4)
+            continue
+        for doc in data.get("docs") or []:
+            key = doc.get("key") or doc.get("cover_i")
+            if key in seen:
+                continue
+            seen.add(key)
+            docs.append(doc)
+        time.sleep(PAUSE)
+    return docs
+
+
+def title_score(doc_title: str, book_title: str) -> float:
+    a = set(normalize(book_title).split())
+    b = set(normalize(doc_title).split())
+    if not a:
+        return 0.0
+    return len(a & b) / len(a)
+
+
+def pick_cover(docs: list[dict], book_title: str, edition: str) -> tuple[str, bool]:
+    """Return (cover_url, edition_matched)."""
+    num = edition_number(edition)
+    ranked: list[tuple[float, dict]] = []
+    for doc in docs:
+        if not doc.get("cover_i"):
+            continue
+        score = title_score(doc.get("title") or "", book_title)
+        if score < 0.5:
+            continue
+        doc_title = normalize(doc.get("title") or "")
+        ed_bonus = 0.0
+        if num:
+            # Match "3rd edition", "3 edition", ", 3rd", etc.
+            if re.search(rf"\b{re.escape(num)}(st|nd|rd|th)?\s*edition\b", doc_title):
+                ed_bonus = 2.0
+            elif re.search(rf",\s*{re.escape(num)}(st|nd|rd|th)?\b", doc_title):
+                ed_bonus = 1.5
+            elif num in doc_title and "edition" in doc_title:
+                ed_bonus = 1.0
+        ranked.append((score + ed_bonus + min(int(doc.get("edition_count") or 0), 10) * 0.01, doc))
+
+    if not ranked:
+        return "", False
+    ranked.sort(key=lambda x: x[0], reverse=True)
+    best_score, best = ranked[0]
+    url = COVER_TMPL.format(cover_id=int(best["cover_i"]))
+    matched = best_score >= 1.5  # title overlap + edition bonus
+    return url, matched
+
+
+def current_cover_id(url: str) -> str | None:
+    m = re.search(r"/b/id/(\d+)-", url or "")
+    return m.group(1) if m else None
+
+
+def process(book: dict) -> tuple[str, str, str]:
+    """Returns (id, new_url_or_empty, reason)."""
+    edition = book.get("edition") or ""
+    num = edition_number(edition)
+    # Only rematch numbered / year editions (skip Online Resource, etc.)
+    if not num:
+        return book["id"], "", "skip"
+    if "online" in edition.lower() or "official" in edition.lower():
+        return book["id"], "", "skip"
+
+    docs = search(book["title"], edition)
+    url, matched = pick_cover(docs, book["title"], edition)
+    if not url:
+        return book["id"], "", "miss"
+    old_id = current_cover_id(book.get("coverImage") or "")
+    new_id = current_cover_id(url)
+    if old_id and new_id and old_id == new_id:
+        return book["id"], "", "same"
+    if matched or not old_id:
+        return book["id"], url, "update" if matched else "fill"
+    # If not clearly edition-matched, still update when title is strong and
+    # current cover is Open Library (prefer fresher ranked result).
+    if (book.get("coverImage") or "").startswith("https://covers.openlibrary.org/") and new_id:
+        # Only replace when the winning doc title includes the edition token
+        return book["id"], url if matched else "", "keep"
+    return book["id"], "", "keep"
+
+
+def main() -> None:
+    books = json.loads(BOOKS_PATH.read_text(encoding="utf-8"))
+    candidates = [
+        b
+        for b in books
+        if edition_number(b.get("edition") or "")
+        and "online" not in (b.get("edition") or "").lower()
+    ]
+    print(f"Candidates: {len(candidates)}")
+
+    updates: dict[str, str] = {}
+    stats = {"update": 0, "same": 0, "miss": 0, "skip": 0, "keep": 0, "fill": 0}
+
+    def worker(book: dict):
+        time.sleep(PAUSE)
+        return process(book)
+
+    with ThreadPoolExecutor(max_workers=MAX_WORKERS) as pool:
+        futures = {pool.submit(worker, b): b for b in candidates}
+        done = 0
+        for fut in as_completed(futures):
+            book = futures[fut]
+            try:
+                book_id, url, reason = fut.result()
+            except Exception as exc:  # noqa: BLE001
+                print(f"error {book['id']}: {exc}")
+                book_id, url, reason = book["id"], "", "miss"
+            stats[reason] = stats.get(reason, 0) + 1
+            if url:
+                updates[book_id] = url
+                print(f"+ {book['title'][:55]} [{book.get('edition')}] -> {url}")
+            done += 1
+            if done % 25 == 0:
+                print(f"progress {done}/{len(candidates)} updates={len(updates)} {stats}")
+
+    changed = 0
+    for b in books:
+        if b["id"] in updates:
+            b["coverImage"] = updates[b["id"]]
+            changed += 1
+
+    BOOKS_PATH.write_text(json.dumps(books, indent=2, ensure_ascii=False) + "\n", encoding="utf-8")
+    print(f"Done. Updated {changed} covers. Stats={stats}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/web/components/BookCard.module.css b/web/components/BookCard.module.css
index e3a2735..e598c0b 100644
--- a/web/components/BookCard.module.css
+++ b/web/components/BookCard.module.css
@@ -15,6 +15,7 @@
 }
 
 .coverWrap {
+  position: relative;
   aspect-ratio: 3 / 4;
   border-radius: var(--radius-lg);
   overflow: hidden;
@@ -27,6 +28,45 @@
   height: 100%;
   object-fit: cover;
   display: block;
+  opacity: 0;
+  transition: opacity 280ms ease;
+}
+
+.coverVisible {
+  opacity: 1;
+}
+
+.skeleton {
+  position: absolute;
+  inset: 0;
+  background: linear-gradient(
+    110deg,
+    var(--surface) 0%,
+    var(--surface-raised) 40%,
+    var(--surface) 80%
+  );
+  background-size: 200% 100%;
+  animation: coverShimmer 1.2s ease-in-out infinite;
+}
+
+@keyframes coverShimmer {
+  0% {
+    background-position: 100% 0;
+  }
+  100% {
+    background-position: -100% 0;
+  }
+}
+
+@media (prefers-reduced-motion: reduce) {
+  .skeleton {
+    animation: none;
+    background: var(--surface-raised);
+  }
+
+  .cover {
+    transition: none;
+  }
 }
 
 .blank {
diff --git a/web/components/BookCard.tsx b/web/components/BookCard.tsx
index 29a259c..c9552ff 100644
--- a/web/components/BookCard.tsx
+++ b/web/components/BookCard.tsx
@@ -1,6 +1,7 @@
 import type { Book } from "../lib/types";
 import { CATEGORIES } from "../lib/types";
 import { LANGUAGES } from "../data/languages";
+import { BookCover } from "./BookCover";
 import styles from "./BookCard.module.css";
 
 type Props = {
@@ -12,29 +13,16 @@ function categoryLabel(id: Book["category"]): string {
 }
 
 export function BookCard({ book }: Props) {
-  const hasCover = Boolean(book.coverImage?.trim());
   const author = book.author?.trim() || "Author TBA";
   const language =
     LANGUAGES.find((l) => l.id === book.language)?.label ?? book.language;
   const level = categoryLabel(book.category);
+  const coverSrc = book.coverImage?.trim() || "";
 
   return (
     <article className={styles.card}>
       <div className={styles.coverWrap}>
-        {hasCover ? (
-          // eslint-disable-next-line @next/next/no-img-element
-          <img
-            className={styles.cover}
-            src={book.coverImage}
-            alt={`Cover for ${book.title}`}
-            loading="lazy"
-          />
-        ) : (
-          <div className={styles.blank} aria-hidden>
-            <span className={styles.blankSpine} />
-            <span className={styles.blankLabel}>Cover</span>
-          </div>
-        )}
+        <BookCover src={coverSrc} title={book.title} />
       </div>
 
       <div className={styles.meta}>
diff --git a/web/components/BookCover.tsx b/web/components/BookCover.tsx
new file mode 100644
index 0000000..837ed53
--- /dev/null
+++ b/web/components/BookCover.tsx
@@ -0,0 +1,50 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import styles from "./BookCard.module.css";
+
+type Props = {
+  src: string;
+  title: string;
+};
+
+export function BookCover({ src, title }: Props) {
+  const [status, setStatus] = useState<"loading" | "loaded" | "error">(
+    "loading",
+  );
+
+  useEffect(() => {
+    setStatus("loading");
+  }, [src]);
+
+  if (!src.trim() || status === "error") {
+    return (
+      <div className={styles.blank} aria-hidden>
+        <span className={styles.blankSpine} />
+        <span className={styles.blankLabel}>Cover</span>
+      </div>
+    );
+  }
+
+  return (
+    <>
+      {status === "loading" ? (
+        <div className={styles.skeleton} aria-hidden />
+      ) : null}
+      {/* eslint-disable-next-line @next/next/no-img-element */}
+      <img
+        className={
+          status === "loaded"
+            ? `${styles.cover} ${styles.coverVisible}`
+            : styles.cover
+        }
+        src={src}
+        alt={`Cover for ${title}`}
+        loading="lazy"
+        decoding="async"
+        onLoad={() => setStatus("loaded")}
+        onError={() => setStatus("error")}
+      />
+    </>
+  );
+}
diff --git a/web/data/books.json b/web/data/books.json
index 681a18c..0b0b91f 100644
--- a/web/data/books.json
+++ b/web/data/books.json
@@ -17,7 +17,7 @@
     "category": "beginner",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/18VgBH8O9Vy1q3zCkpssl6VO8RxzwIKzm/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8245395-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/15225531-L.jpg"
   },
   {
     "id": "python-automate-the-boring-stuff-with-python",
@@ -597,7 +597,7 @@
     "category": "beginner",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1fYezQ9QtxOqnS_99ETaWVYMlOPsUtJfF/view?usp=sharing",
-    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1718975574i/212162930.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/12772880-L.jpg"
   },
   {
     "id": "javascript-a-smarter-way-to-learn-javascript",
@@ -2357,7 +2357,7 @@
     "category": "intermediate",
     "edition": "4th Edition",
     "driveUrl": "https://drive.google.com/file/d/1-xjwSQI9zqn8ffkfVQs4eSgN74RRLXPc/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/6684943-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/8633699-L.jpg"
   },
   {
     "id": "cpp-c-crash-course",
@@ -4697,7 +4697,7 @@
     "category": "advanced",
     "edition": "2nd Edition",
     "driveUrl": "https://adv-r.hadley.nz/",
-    "coverImage": "https://covers.openlibrary.org/b/id/8778978-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/11222776-L.jpg"
   },
   {
     "id": "r-r-packages",

From e1f31fcaeb380b878227e01f6af9c9ee127f297f Mon Sep 17 00:00:00 2001
From: Cursor Agent <cursoragent@cursor.com>
Date: Sat, 18 Jul 2026 05:18:40 +0000
Subject: [PATCH 2/2] Use shared reference SVG and uniquify duplicate book
 covers

Show a custom reference cover for docs/reference entries instead of
repeated logos/favicons. Give Clojure, Objective-C, and other shelves
distinct covers so different books no longer share the same image.

Co-authored-by: Muhammad Saim Shafique <contact@saimshafique.com>
---
 web/components/BookCard.tsx     |   3 +-
 web/components/BookCover.tsx    |   5 +-
 web/data/books.json             | 282 ++++++++++++++++----------------
 web/lib/covers.ts               |  33 ++++
 web/public/covers/reference.svg |  40 +++++
 5 files changed, 219 insertions(+), 144 deletions(-)
 create mode 100644 web/lib/covers.ts
 create mode 100644 web/public/covers/reference.svg

diff --git a/web/components/BookCard.tsx b/web/components/BookCard.tsx
index c9552ff..231cd06 100644
--- a/web/components/BookCard.tsx
+++ b/web/components/BookCard.tsx
@@ -1,5 +1,6 @@
 import type { Book } from "../lib/types";
 import { CATEGORIES } from "../lib/types";
+import { coverSrcForBook } from "../lib/covers";
 import { LANGUAGES } from "../data/languages";
 import { BookCover } from "./BookCover";
 import styles from "./BookCard.module.css";
@@ -17,7 +18,7 @@ export function BookCard({ book }: Props) {
   const language =
     LANGUAGES.find((l) => l.id === book.language)?.label ?? book.language;
   const level = categoryLabel(book.category);
-  const coverSrc = book.coverImage?.trim() || "";
+  const coverSrc = coverSrcForBook(book);
 
   return (
     <article className={styles.card}>
diff --git a/web/components/BookCover.tsx b/web/components/BookCover.tsx
index 837ed53..ca97c5c 100644
--- a/web/components/BookCover.tsx
+++ b/web/components/BookCover.tsx
@@ -9,12 +9,13 @@ type Props = {
 };
 
 export function BookCover({ src, title }: Props) {
+  const isLocalAsset = src.startsWith("/");
   const [status, setStatus] = useState<"loading" | "loaded" | "error">(
-    "loading",
+    isLocalAsset ? "loaded" : "loading",
   );
 
   useEffect(() => {
-    setStatus("loading");
+    setStatus(src.startsWith("/") ? "loaded" : "loading");
   }, [src]);
 
   if (!src.trim() || status === "error") {
diff --git a/web/data/books.json b/web/data/books.json
index 0b0b91f..1b5fa76 100644
--- a/web/data/books.json
+++ b/web/data/books.json
@@ -527,7 +527,7 @@
     "category": "references",
     "edition": "5th Edition",
     "driveUrl": "https://drive.google.com/file/d/1fAiatWg2i2BwHviGybMPUrwafRDBtgEg/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/988215-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "python-python-testing-with-pytest",
@@ -537,7 +537,7 @@
     "category": "references",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1CanVLEhQ_XOgrq4YRm2fRUkfWx07CqF0/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508770-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "python-beyond-the-basic-stuff-with-python",
@@ -547,7 +547,7 @@
     "category": "references",
     "edition": "First & only edition",
     "driveUrl": "https://drive.google.com/file/d/1txbFLEtmJrp4H9P7oUC048jwLUPOYHBa/view?usp=sharing",
-    "coverImage": "https://nostarch.com/sites/default/files/BeyondBasicPython.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "python-the-python-3-standard-library-by-example",
@@ -557,7 +557,7 @@
     "category": "references",
     "edition": "First & only edition",
     "driveUrl": "https://drive.google.com/file/d/134t_JdiXzJ6vKcEjaprmm8X7uCs7AHjH/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508847-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "python-learning-python",
@@ -567,7 +567,7 @@
     "category": "references",
     "edition": "5th Edition",
     "driveUrl": "https://drive.google.com/file/d/1rIJ6NyKuTAM9hgGC2HDoMKaxBVIcAWt-/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/1312568-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-javascript-from-beginner-to-professional",
@@ -637,7 +637,7 @@
     "category": "intermediate",
     "edition": "Latest Edition",
     "driveUrl": "https://drive.google.com/file/d/19bfwUL8aTigDnEYxNFqpmX6y1uIo2WyO/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/10737959-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/9245523-L.jpg"
   },
   {
     "id": "javascript-effective-javascript-68-specific-ways-to-harness-the-power-of-javascript",
@@ -817,7 +817,7 @@
     "category": "specialized",
     "edition": "First & only edition",
     "driveUrl": "https://drive.google.com/file/d/1xb98X17vjQMhe0_AvioEoABruQcEt3tk/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8513336-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1595211284i/54419423.jpg"
   },
   {
     "id": "javascript-web-development-with-node-and-express",
@@ -867,7 +867,7 @@
     "category": "specialized",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/1oOnmbcRtCA8Z4fWxJPxyvsSC0gpAaRc6/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/8513336-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1575531808i/49099745.jpg"
   },
   {
     "id": "javascript-distributed-systems-with-node-js",
@@ -1017,7 +1017,7 @@
     "category": "references",
     "edition": "7th Edition",
     "driveUrl": "https://drive.google.com/file/d/1ZlTJ_sVZst1Hp0o-TSQUM8DsdkpK7Ieq/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/8512695-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-professional-javascript-for-web-developers",
@@ -1027,7 +1027,7 @@
     "category": "references",
     "edition": "5th Edition",
     "driveUrl": "https://drive.google.com/file/d/1uGvyYs8Q0Pf5t3v1RGnRKawU7ond7E3K/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/10724347-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-javascript-es2015-enlightenment",
@@ -1037,7 +1037,7 @@
     "category": "references",
     "edition": "2025 Digital Edition",
     "driveUrl": "https://frontendmasters.com/guides/javascript-enlightenment/",
-    "coverImage": "https://images.isbndb.com/covers/252673482704.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-javascript-allong",
@@ -1047,7 +1047,7 @@
     "category": "references",
     "edition": "First & only edition",
     "driveUrl": "https://drive.google.com/file/d/1nYPIMuOO-VmPbGNj_WlxSlYim4jFb42u/view?usp=sharing",
-    "coverImage": "https://d2sofvawe08yqg.cloudfront.net/javascriptallongesix/s_hero2x?1620458665"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-javascript-the-first-20-years",
@@ -1057,7 +1057,7 @@
     "category": "references",
     "edition": "First & only edition",
     "driveUrl": "https://drive.google.com/file/d/1iKIRAOUXqzpnQDdpQTx_iwTNBwcpAk8k/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/10737959-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-mdn-web-docs",
@@ -1067,7 +1067,7 @@
     "category": "references",
     "edition": "Living Documentation",
     "driveUrl": "https://developer.mozilla.org/en-US/docs/Web/JavaScript",
-    "coverImage": "https://developer.mozilla.org/apple-touch-icon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "javascript-javascript-pocket-reference",
@@ -1077,7 +1077,7 @@
     "category": "references",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/1TLqPvemKX4PaRs2zA5JN_09Vvb17BPTU/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/10724321-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-think-java",
@@ -1507,7 +1507,7 @@
     "category": "references",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/168IKLmFzRpiaVvRA5lHXvTMXc8g_rYTf/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/2320484-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-modern-concurrency-in-java-virtual-threads-structured-concurrency-and-beyond",
@@ -1517,7 +1517,7 @@
     "category": "references",
     "edition": "2025 Release",
     "driveUrl": "https://drive.google.com/file/d/1yHaxb6huZpRhDbe5bywR8VIwNziu1n4k/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/15169414-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-java-structured-concurrency",
@@ -1527,7 +1527,7 @@
     "category": "references",
     "edition": "2025 Edition",
     "driveUrl": "https://www.packtpub.com/en-us/product/java-structured-concurrency-9781806105038",
-    "coverImage": "https://covers.openlibrary.org/b/id/15169414-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-virtual-threads-structured-concurrency-and-scoped-values",
@@ -1537,7 +1537,7 @@
     "category": "references",
     "edition": "2024 Edition",
     "driveUrl": "https://drive.google.com/file/d/1celv84qkw8DPFHo8EZegSN8i3yzO8y3i/view?usp=sharing",
-    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1721275588i/214102078.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-mastering-java-concurrency-threads-synchronization-and-parallel-processing",
@@ -1547,7 +1547,7 @@
     "category": "references",
     "edition": "2025 Edition",
     "driveUrl": "https://www.amazon.com/Mastering-Java-Concurrency-Synchronization-Processing-ebook/dp/B0DHTKSQJQ",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508777-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-java-the-complete-reference",
@@ -1557,7 +1557,7 @@
     "category": "references",
     "edition": "13th Edition",
     "driveUrl": "https://drive.google.com/file/d/1auXGujIKKFyw0WU9xB07LyX4Oz2h_yPb/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/13660534-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-java-in-a-nutshell",
@@ -1567,7 +1567,7 @@
     "category": "references",
     "edition": "8th Edition",
     "driveUrl": "https://drive.google.com/file/d/1qIPTpVltTi02m6QdRvynIDtgr0HVE80n/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/805638-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "java-java-pocket-guide",
@@ -1577,7 +1577,7 @@
     "category": "references",
     "edition": "5th Edition",
     "driveUrl": "https://drive.google.com/file/d/11F1OMndhAHvHTLXDd2HbU4KvLk2JZtWt/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/8514237-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "csharp-head-first-c",
@@ -1927,7 +1927,7 @@
     "category": "references",
     "edition": "",
     "driveUrl": "https://learn.microsoft.com/en-us/dotnet/architecture/modern-web-apps-azure/",
-    "coverImage": "https://covers.openlibrary.org/b/id/12056174-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "csharp-c-12-in-a-nutshell-the-definitive-reference",
@@ -1937,7 +1937,7 @@
     "category": "references",
     "edition": "2023 Edition",
     "driveUrl": "https://drive.google.com/file/d/13or6QeIIosQcKZGIGoGE7M2Ki0TDeZ5d/view?usp=sharing",
-    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1697850369i/195616085.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "csharp-functional-programming-in-c",
@@ -1947,7 +1947,7 @@
     "category": "references",
     "edition": "6th early release - 2024 Edition",
     "driveUrl": "https://drive.google.com/file/d/1o-BwSGn2l8tXFiRYOoCGxHGS263pItm3/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8651949-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "csharp-programming-c-12",
@@ -1957,7 +1957,7 @@
     "category": "references",
     "edition": "2024 Edition",
     "driveUrl": "https://drive.google.com/file/d/1LQCi_6puixk5lUEG4kJO90N-q0Men6Xa/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/192602-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "csharp-c-12-pocket-reference",
@@ -1967,7 +1967,7 @@
     "category": "references",
     "edition": "2023 Edition",
     "driveUrl": "https://drive.google.com/file/d/12L3Ktd2UTVrpnrQzyqQgEY6WXSvuULnj/view?usp=sharing",
-    "coverImage": "https://images.isbndb.com/covers/27108873482578.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "c-c-programming-a-modern-approach",
@@ -2117,7 +2117,7 @@
     "category": "advanced",
     "edition": "2020 Release",
     "driveUrl": "https://drive.google.com/file/d/14kFQJ7kX_xC2UYqV8Tgegc7UgmySKI4i/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/193724-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/12022311-L.jpg"
   },
   {
     "id": "c-expert-c-programming-deep-c-secrets",
@@ -2127,7 +2127,7 @@
     "category": "advanced",
     "edition": "1994 Edition",
     "driveUrl": "https://drive.google.com/file/d/13ZGiz-umwxXek9tmBBJ5vDtHl9DMmdi8/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/88161-L.jpg"
+    "coverImage": "https://images.isbndb.com/covers/24888063482234.jpg"
   },
   {
     "id": "c-tcp-ip-illustrated-volume-1-the-protocols",
@@ -2257,7 +2257,7 @@
     "category": "references",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1JNOX-OHCjTq6VP712BKJba3zq2wEsL0b/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8629281-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "c-beej-s-guide-to-c-programming",
@@ -2267,7 +2267,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://beej.us/guide/bgc/",
-    "coverImage": "https://beej.us/guide/favicon.gif"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "cpp-c-primer",
@@ -2407,7 +2407,7 @@
     "category": "advanced",
     "edition": "",
     "driveUrl": "https://drive.google.com/file/d/158N5zEbqhUg8i7GRcpJjMslNtXgxY0KB/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/88161-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/8508931-L.jpg"
   },
   {
     "id": "cpp-hands-on-design-patterns-with-c",
@@ -2467,7 +2467,7 @@
     "category": "references",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/19BD-BOKEZNsqXKtozVzA_dGkZMron0Qx/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/134618-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "cpp-c-pocket-reference",
@@ -2477,7 +2477,7 @@
     "category": "references",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1aDURg39oCc1zuME_JZL730IoFGNdyKs4/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/13819416-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "typescript-learning-typescript",
@@ -2517,7 +2517,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://www.typescriptlang.org/docs/handbook/intro.html",
-    "coverImage": "https://www.typescriptlang.org/icons/icon-48x48.png?v=8944a05a8b601855de116c8a56d3b3ae"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "typescript-effective-typescript",
@@ -2597,7 +2597,7 @@
     "category": "specialized",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/1VALBli8K9_ZPgfnoRfDzhocIcbvmpPPz/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8513336-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1575531808i/49099745.jpg"
   },
   {
     "id": "typescript-angular-development-with-typescript",
@@ -2627,7 +2627,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://basarat.gitbook.io/typescript/",
-    "coverImage": "https://basarat.gitbook.io/typescript/~gitbook/ogimage/-LxQ3jd_Z3snLZ7ef2c3"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "typescript-typescript-weekly",
@@ -2637,7 +2637,7 @@
     "category": "references",
     "edition": "Newsletter/Reference",
     "driveUrl": "https://www.typescript-weekly.com/",
-    "coverImage": "https://www.typescript-weekly.com/images/typescript-weekly-email-preview-958x1078@2x.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "typescript-utility-types-reference",
@@ -2647,7 +2647,7 @@
     "category": "references",
     "edition": "Official Reference",
     "driveUrl": "https://www.typescriptlang.org/docs/handbook/utility-types.html",
-    "coverImage": "https://www.typescriptlang.org/icons/icon-48x48.png?v=8944a05a8b601855de116c8a56d3b3ae"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "go-the-go-programming-language",
@@ -2727,7 +2727,7 @@
     "category": "intermediate",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1HFnAUXW-_NkIou9evJUh3HX7JAt_t4He/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508549-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/8509379-L.jpg"
   },
   {
     "id": "go-go-in-practice",
@@ -2827,7 +2827,7 @@
     "category": "references",
     "edition": "",
     "driveUrl": "https://go.dev/doc/",
-    "coverImage": "https://go.dev/doc/gopher/gopherbelly300.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "go-go-standard-library-cookbook",
@@ -2837,7 +2837,7 @@
     "category": "references",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1_VBBGh5PhrSdmYemSOxk7sfOtUOHTeAa/view?usp=drive_link",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508549-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-the-rust-programming-language",
@@ -2867,7 +2867,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://doc.rust-lang.org/rust-by-example/",
-    "coverImage": "https://covers.openlibrary.org/b/id/8509109-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-beginning-rust",
@@ -2927,7 +2927,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://doc.rust-lang.org/nomicon/",
-    "coverImage": "https://www.rust-lang.org/static/images/rust-social-wide.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-programming-webassembly-with-rust",
@@ -2987,7 +2987,7 @@
     "category": "specialized",
     "edition": "Online Resource",
     "driveUrl": "https://drive.google.com/file/d/1nskPjDJBUesrfDuWp49In7DfFTFxDxoX/view?usp=sharing",
-    "coverImage": "https://www.rust-lang.org/static/images/rust-social-wide.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-rust-web-development",
@@ -3027,7 +3027,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://doc.rust-lang.org/cargo/",
-    "coverImage": "https://covers.openlibrary.org/b/id/13163304-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-idiomatic-rust",
@@ -3037,7 +3037,7 @@
     "category": "references",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1OHEm3A2ydVj1g6gqwB6mCcJOeJNQGTWW/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/13168046-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "rust-effective-rust",
@@ -3047,7 +3047,7 @@
     "category": "references",
     "edition": "1st Edition",
     "driveUrl": "https://www.lurklurk.org/effective-rust/",
-    "coverImage": "https://covers.openlibrary.org/b/id/12469430-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "php-head-first-php-mysql",
@@ -3217,7 +3217,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://phptherightway.com/",
-    "coverImage": "https://covers.openlibrary.org/b/id/388713-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "php-the-php-manual",
@@ -3227,7 +3227,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.php.net/manual/en/",
-    "coverImage": "https://covers.openlibrary.org/b/id/8578103-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "php-php-8-quick-scripting-reference",
@@ -3237,7 +3237,7 @@
     "category": "references",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/1plFybWhVvACeMgufK65FA5Rb6asoSefw/view?usp=sharing",
-    "coverImage": "https://images.isbndb.com/covers/12456183482716.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "kotlin-head-first-kotlin",
@@ -3397,7 +3397,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://kotlinlang.org/docs/home.html",
-    "coverImage": "https://kotlinlang.org/assets/images/open-graph/docs.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "kotlin-kotlin-hands-on",
@@ -3407,7 +3407,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://play.kotlinlang.org/byExample/overview",
-    "coverImage": "https://covers.openlibrary.org/b/id/8508724-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "sql-sql-practice-problems",
@@ -3587,7 +3587,7 @@
     "category": "references",
     "edition": "4th Edition",
     "driveUrl": "https://drive.google.com/file/d/1rEXIAP3fyJ4jIoW3HBQL6LhfVWcAiUaS/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/6616859-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "sql-modern-sql",
@@ -3597,7 +3597,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://modern-sql.com/",
-    "coverImage": "https://covers.openlibrary.org/b/id/11190655-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "swift-swift-apprentice",
@@ -3747,7 +3747,7 @@
     "category": "specialized",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1JOZ6UwAlg9BgJvg65dZ7P45dnk5xDHn7/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/14133335-L.jpg"
+    "coverImage": "https://www.objc.io/images/books/app-architecture/app-architecture-hero-original_a634187.png"
   },
   {
     "id": "swift-hacking-with-swift",
@@ -3767,7 +3767,7 @@
     "category": "specialized",
     "edition": "3rd Edition",
     "driveUrl": "https://drive.google.com/file/d/1bClNPwkQx9qBSG9kTndqjHOw2ps01rrx/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/14133335-L.jpg"
+    "coverImage": "https://assets.alexandria.raywenderlich.com/books/890cabe271136403326f8252c59cfdd47160fa63fe7a37801d3bffc1dbbf03f3/images/fdc8eaf7ef46db5a36077c3a61703956/original.png"
   },
   {
     "id": "swift-the-swift-programming-language",
@@ -3777,7 +3777,7 @@
     "category": "references",
     "edition": "Official Documentation",
     "driveUrl": "https://docs.swift.org/swift-book/documentation/the-swift-programming-language/",
-    "coverImage": "https://covers.openlibrary.org/b/id/12641066-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "swift-swiftui-views-mastery",
@@ -3787,7 +3787,7 @@
     "category": "references",
     "edition": "",
     "driveUrl": "https://drive.google.com/file/d/1GhSi3SP499yqX8ZX-qcldFalkIlB7Pue/view?usp=sharing",
-    "coverImage": "https://www.bigmountainstudio.com/content-assets/public/eyJhbGciOiJIUzI1NiJ9.eyJvYmplY3Rfa2V5IjoiN2w0MHBnbDY0b3BkZTc2dWVzZ21obmg3bHVxOSIsImRvbWFpbiI6Ind3dy5iaWdtb3VudGFpbnN0dWRpby5jb20ifQ.393smxjW311lDF3r9dDiVwyo5BdwCDyf8-d8IzY5JxU"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "ruby-the-well-grounded-rubyist",
@@ -3867,7 +3867,7 @@
     "category": "intermediate",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1qtL_lhD2tq2TB6rSpdVf5E7tjmXJYt0J/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8509174-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1375527990i/18278735.jpg"
   },
   {
     "id": "ruby-ruby-under-a-microscope",
@@ -3977,7 +3977,7 @@
     "category": "specialized",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/1b_Z0wSRlSOYzyns69uFsA7YUn3iDhBNz/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/8509174-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1491718143i/31338775.jpg"
   },
   {
     "id": "ruby-black-hat-ruby",
@@ -3997,7 +3997,7 @@
     "category": "references",
     "edition": "1st Edition",
     "driveUrl": "https://drive.google.com/file/d/15dMASM-GFoEMMnDm4m_3aJXPjDOsTz1O/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/1312587-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "ruby-ruby-cookbook",
@@ -4007,7 +4007,7 @@
     "category": "references",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1m7lBtlRlCdWrG_CIqyaSyRzrYHfZWvtn/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/10361371-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "ruby-official-ruby-documentation",
@@ -4017,7 +4017,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.ruby-lang.org/en/documentation/",
-    "coverImage": "https://www.ruby-lang.org/images/og-image.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "ruby-the-ruby-style-guide",
@@ -4027,7 +4027,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://rubystyle.guide/",
-    "coverImage": "https://avatars.githubusercontent.com/u/226424?s=200&v=4"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "dart-flutter-for-dummies",
@@ -4157,7 +4157,7 @@
     "category": "specialized",
     "edition": "2023 Edition",
     "driveUrl": "https://drive.google.com/file/d/1-WCYcuFgqAIUOcKTh3xbOb2EGuP2H-te/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/13281016-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1653704350i/61178784.jpg"
   },
   {
     "id": "dart-practical-flutter",
@@ -4177,7 +4177,7 @@
     "category": "specialized",
     "edition": "2nd Edition",
     "driveUrl": "https://drive.google.com/file/d/1yyV7cizosSVc0_qBIHZUTMdYqSF1rDzQ/view?usp=sharing",
-    "coverImage": "https://covers.openlibrary.org/b/id/13281016-L.jpg"
+    "coverImage": "https://m.media-amazon.com/images/S/compressed.photo.goodreads.com/books/1660591124i/60747284.jpg"
   },
   {
     "id": "dart-effective-dart",
@@ -4187,7 +4187,7 @@
     "category": "references",
     "edition": "Official Reference",
     "driveUrl": "https://dart.dev/effective-dart",
-    "coverImage": "https://dart.dev/assets/img/logo/dart-logo-for-shares.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "dart-dart-language-documentation",
@@ -4197,7 +4197,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://dart.dev/guides",
-    "coverImage": "https://dart.dev/assets/img/logo/dart-logo-for-shares.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "dart-a-tour-of-the-dart-language",
@@ -4207,7 +4207,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://dart.dev/language",
-    "coverImage": "https://dart.dev/assets/img/logo/dart-logo-for-shares.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "scala-scala-3-book",
@@ -4237,7 +4237,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://underscore.io/books/essential-scala/",
-    "coverImage": "https://covers.openlibrary.org/b/id/12985499-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "scala-programming-in-scala",
@@ -4267,7 +4267,7 @@
     "category": "intermediate",
     "edition": "Official language tour",
     "driveUrl": "https://docs.scala-lang.org/tour/",
-    "coverImage": "https://covers.openlibrary.org/b/id/6441552-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "scala-hands-on-scala-programming",
@@ -4367,7 +4367,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://docs.scala-lang.org/",
-    "coverImage": "https://docs.scala-lang.org/resources/img/scala-spiral-3d-2-toned-down.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "scala-a-tour-of-scala",
@@ -4377,7 +4377,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://docs.scala-lang.org/tour/tour-of-scala.html",
-    "coverImage": "https://covers.openlibrary.org/b/id/6441552-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "elixir-elixir-getting-started-guide",
@@ -4397,7 +4397,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://elixirschool.com/",
-    "coverImage": "https://covers.openlibrary.org/b/id/1357762-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "elixir-programming-elixir-1-6",
@@ -4527,7 +4527,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://elixir-lang.org/docs.html",
-    "coverImage": "https://elixir-lang.org/images/logo/logo.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "elixir-elixir-on-hexdocs",
@@ -4537,7 +4537,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://hexdocs.pm/elixir/",
-    "coverImage": "https://hexdocs.pm/assets/apple-touch-icon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "elixir-erlang-otp-documentation",
@@ -4547,7 +4547,7 @@
     "category": "references",
     "edition": "VM platform docs",
     "driveUrl": "https://www.erlang.org/docs",
-    "coverImage": "https://www.erlang.org/assets/img/erlang-228x200.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "elixir-hexdocs",
@@ -4557,7 +4557,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://hexdocs.pm/",
-    "coverImage": "https://hexdocs.pm/assets/apple-touch-icon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-the-linux-command-line",
@@ -4577,7 +4577,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://tldp.org/LDP/Bash-Beginners-Guide/html/",
-    "coverImage": "https://covers.openlibrary.org/b/id/2720824-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-advanced-bash-scripting-guide",
@@ -4587,7 +4587,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://tldp.org/LDP/abs/html/",
-    "coverImage": "https://covers.openlibrary.org/b/id/9351378-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-data-science-at-the-command-line",
@@ -4607,7 +4607,7 @@
     "category": "references",
     "edition": "Official Reference",
     "driveUrl": "https://www.gnu.org/software/bash/manual/",
-    "coverImage": "https://covers.openlibrary.org/b/id/1688274-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-greg-s-wiki-bashguide",
@@ -4617,7 +4617,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://mywiki.wooledge.org/BashGuide",
-    "coverImage": "https://upload.wikimedia.org/wikipedia/commons/4/4b/Bash_Logo_Colored.svg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-shellcheck",
@@ -4627,7 +4627,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.shellcheck.net/",
-    "coverImage": "https://www.shellcheck.net/shellcheck.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "shell-google-shell-style-guide",
@@ -4637,7 +4637,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://google.github.io/styleguide/shellguide.html",
-    "coverImage": "https://www.gstatic.com/images/branding/product/2x/googleg_48dp.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "r-r-for-data-science",
@@ -4787,7 +4787,7 @@
     "category": "references",
     "edition": "Official Manual",
     "driveUrl": "https://cran.r-project.org/doc/manuals/r-release/R-intro.html",
-    "coverImage": "https://covers.openlibrary.org/b/id/723680-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "r-the-r-language-definition",
@@ -4797,7 +4797,7 @@
     "category": "references",
     "edition": "Official Manual",
     "driveUrl": "https://cran.r-project.org/doc/manuals/r-release/R-lang.html",
-    "coverImage": "https://covers.openlibrary.org/b/id/5702426-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "r-rdocumentation",
@@ -4807,7 +4807,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.rdocumentation.org/",
-    "coverImage": "https://www.r-project.org/logo/Rlogo.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "julia-think-julia-how-to-think-like-a-computer-scientist",
@@ -4827,7 +4827,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://en.wikibooks.org/wiki/Introducing_Julia",
-    "coverImage": "https://covers.openlibrary.org/b/id/13304403-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "julia-julia-programming-for-operations-research",
@@ -4917,7 +4917,7 @@
     "category": "specialized",
     "edition": "1st Edition",
     "driveUrl": "https://www.amazon.com/Statistics-Julia-Fundamentals-Data-Science/dp/3030401507",
-    "coverImage": "https://covers.openlibrary.org/b/id/12407243-L.jpg"
+    "coverImage": "https://statisticswithjulia.org/img/book1Cover.png"
   },
   {
     "id": "julia-machine-learning-with-julia",
@@ -4927,7 +4927,7 @@
     "category": "specialized",
     "edition": "1st Edition",
     "driveUrl": "https://www.packtpub.com/product/machine-learning-with-julia/9781839218408",
-    "coverImage": "https://covers.openlibrary.org/b/id/12407243-L.jpg"
+    "coverImage": ""
   },
   {
     "id": "julia-quantitative-economics-with-julia",
@@ -4937,7 +4937,7 @@
     "category": "specialized",
     "edition": "Online Resource",
     "driveUrl": "https://julia.quantecon.org/intro.html",
-    "coverImage": "https://assets.quantecon.org/img/qe-og-logo.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "julia-the-julia-language-documentation",
@@ -4947,7 +4947,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://docs.julialang.org/",
-    "coverImage": "https://raw.githubusercontent.com/JuliaLang/julia-logo-graphics/master/images/julia-logo-color.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "julia-julia-manual-getting-started",
@@ -4957,7 +4957,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://docs.julialang.org/en/v1/manual/getting-started/",
-    "coverImage": "https://covers.openlibrary.org/b/id/7697842-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "julia-juliaacademy",
@@ -4967,7 +4967,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://juliaacademy.com/",
-    "coverImage": "https://raw.githubusercontent.com/JuliaLang/julia-logo-graphics/master/images/julia-logo-color.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "htmlcss-html-and-css-design-and-build-websites",
@@ -5027,7 +5027,7 @@
     "category": "intermediate",
     "edition": "Online Resource",
     "driveUrl": "https://every-layout.dev/",
-    "coverImage": "https://covers.openlibrary.org/b/id/6381423-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "htmlcss-responsive-web-design",
@@ -5097,7 +5097,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://developer.mozilla.org/en-US/docs/Web/HTML",
-    "coverImage": "https://developer.mozilla.org/apple-touch-icon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "htmlcss-mdn-web-docs-css",
@@ -5107,7 +5107,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://developer.mozilla.org/en-US/docs/Web/CSS",
-    "coverImage": "https://developer.mozilla.org/apple-touch-icon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "htmlcss-can-i-use",
@@ -5117,7 +5117,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://caniuse.com/",
-    "coverImage": "https://covers.openlibrary.org/b/id/11753962-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "lua-programming-in-lua",
@@ -5177,7 +5177,7 @@
     "category": "advanced",
     "edition": "Official Reference",
     "driveUrl": "https://www.lua.org/manual/5.4/",
-    "coverImage": "https://www.lua.org/images/lua-logo.gif"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "lua-mastering-lua-programming",
@@ -5217,7 +5217,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.lua.org/docs.html",
-    "coverImage": "https://www.lua.org/images/lua-logo.gif"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "lua-lua-users-wiki",
@@ -5227,7 +5227,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://lua-users.org/wiki/",
-    "coverImage": "https://www.lua.org/images/lua-logo.gif"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "matlab-matlab-for-engineers",
@@ -5247,7 +5247,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://matlabacademy.mathworks.com/",
-    "coverImage": "https://covers.openlibrary.org/b/id/4937707-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "matlab-matlab-a-practical-introduction-to-programming-and-problem-solving",
@@ -5327,7 +5327,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.mathworks.com/help/releases/R2024a/matlab/index.html",
-    "coverImage": "https://upload.wikimedia.org/wikipedia/commons/2/21/Matlab_Logo.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "matlab-matlab-onramp",
@@ -5337,7 +5337,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://matlabacademy.mathworks.com/",
-    "coverImage": "https://matlabacademy.mathworks.com/images/course/panel_gettingstarted.webp"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "assembly-code-the-hidden-language-of-computer-hardware-and-software",
@@ -5437,7 +5437,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.felixcloutier.com/x86/",
-    "coverImage": "https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Intel_logo_%282020%2C_light_blue%29.svg/200px-Intel_logo_%282020%2C_light_blue%29.svg.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "assembly-x86-assembly-wikibooks",
@@ -5447,7 +5447,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://en.wikibooks.org/wiki/X86_Assembly",
-    "coverImage": "https://covers.openlibrary.org/b/id/7589176-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "haskell-learn-you-a-haskell-for-great-good",
@@ -5557,7 +5557,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.haskell.org/documentation/",
-    "coverImage": "https://www.haskell.org/img/haskell-logo.svg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "haskell-hoogle",
@@ -5567,7 +5567,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://hoogle.haskell.org/",
-    "coverImage": "https://covers.openlibrary.org/b/id/6829398-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "powershell-learn-windows-powershell-in-a-month-of-lunches",
@@ -5667,7 +5667,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://learn.microsoft.com/powershell/",
-    "coverImage": "https://learn.microsoft.com/media/logos/logo-powershell-social.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "powershell-powershell-gallery",
@@ -5677,7 +5677,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://www.powershellgallery.com/",
-    "coverImage": "https://powershellgallery.com/Content/Images/Branding/psgallerylogo-whiteinlay.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-zig-language-reference",
@@ -5687,7 +5687,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/documentation/master/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-introduction-to-zig",
@@ -5707,7 +5707,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://ziglearn.org/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-zig-guide",
@@ -5717,7 +5717,7 @@
     "category": "intermediate",
     "edition": "Online Resource",
     "driveUrl": "https://zig.guide/",
-    "coverImage": "https://covers.openlibrary.org/b/id/5934634-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-learning-zig",
@@ -5727,7 +5727,7 @@
     "category": "intermediate",
     "edition": "Online Resource",
     "driveUrl": "https://www.openmymind.net/learning_zig/",
-    "coverImage": "https://covers.openlibrary.org/b/id/15235831-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-zig-documentation-advanced-language-features",
@@ -5737,7 +5737,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/documentation/master/#Language-Reference",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-writing-an-os-in-zig-community-guides",
@@ -5747,7 +5747,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://github.com/ziglang/zig",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-zig-build-system-documentation",
@@ -5757,7 +5757,7 @@
     "category": "specialized",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/learn/build-system/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-using-zig-as-a-c-compiler-cross-linker",
@@ -5767,7 +5767,7 @@
     "category": "specialized",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/learn/overview/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-official-zig-documentation",
@@ -5777,7 +5777,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/documentation/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "zig-zig-standard-library-docs",
@@ -5787,7 +5787,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://ziglang.org/documentation/master/std/",
-    "coverImage": "https://ziglang.org/favicon.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-mastering-ethereum",
@@ -5807,7 +5807,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://solidity-by-example.org/",
-    "coverImage": "https://solidity-by-example.org/favicon.ico"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-cryptozombies",
@@ -5817,7 +5817,7 @@
     "category": "beginner",
     "edition": "Online Resource",
     "driveUrl": "https://cryptozombies.io/",
-    "coverImage": "https://cryptozombies.io/images/preview_image.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-mastering-blockchain-programming-with-solidity",
@@ -5847,7 +5847,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://consensys.github.io/smart-contract-best-practices/",
-    "coverImage": "https://consensys.io/favicon.ico"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-ethernaut-capture-the-ether-style-challenges",
@@ -5857,7 +5857,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://ethernaut.openzeppelin.com/",
-    "coverImage": "https://ethernaut.openzeppelin.com/imgs/metatag.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-building-ethereum-dapps",
@@ -5877,7 +5877,7 @@
     "category": "specialized",
     "edition": "Online Resource",
     "driveUrl": "https://ethereum.org/developers/docs/",
-    "coverImage": "https://ethereum.org/images/heroes/developers-hub-hero.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-solidity-language-documentation",
@@ -5887,7 +5887,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://docs.soliditylang.org/",
-    "coverImage": "https://docs.soliditylang.org/en/latest/_static/img/logo.svg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "solidity-ethereum-developer-docs",
@@ -5897,7 +5897,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://ethereum.org/developers/docs/",
-    "coverImage": "https://ethereum.org/images/heroes/developers-hub-hero.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "perl-learning-perl",
@@ -5997,7 +5997,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://perldoc.perl.org/",
-    "coverImage": "https://cdn.perl.org/perlweb/images/camel_head.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "perl-perl-maven",
@@ -6007,7 +6007,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://perlmaven.com/",
-    "coverImage": "https://perlmaven.com/img/index.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "fortran-modern-fortran-explained",
@@ -6067,7 +6067,7 @@
     "category": "advanced",
     "edition": "Online Resource",
     "driveUrl": "https://www.openmp.org/specifications/",
-    "coverImage": "https://covers.openlibrary.org/b/id/10181184-L.jpg"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "fortran-numerical-computing-with-modern-fortran",
@@ -6107,7 +6107,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://fortranwiki.org/",
-    "coverImage": "https://fortran-lang.org/_static/images/favicon.ico"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "fortran-fortran-discourse-community-docs",
@@ -6117,7 +6117,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://fortran-lang.org/learn/",
-    "coverImage": "https://global.discourse-cdn.com/free1/uploads/fortran_lang/original/1X/50078338be6df8cfc3e2277e9cb3c805f45c6ee6.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "objectivec-programming-in-objective-c",
@@ -6127,7 +6127,7 @@
     "category": "beginner",
     "edition": "6th Edition",
     "driveUrl": "https://www.amazon.com/Programming-Objective-C-6th-Developers-Library/dp/0321967607",
-    "coverImage": "https://covers.openlibrary.org/b/id/410970-L.jpg"
+    "coverImage": "https://images.isbndb.com/covers/16628183482235.jpg"
   },
   {
     "id": "objectivec-objective-c-programming-the-big-nerd-ranch-guide",
@@ -6137,7 +6137,7 @@
     "category": "beginner",
     "edition": "2nd Edition",
     "driveUrl": "https://www.amazon.com/Objective-C-Programming-Nerd-Ranch-Guides/dp/032194206X",
-    "coverImage": "https://covers.openlibrary.org/b/id/410970-L.jpg"
+    "coverImage": "https://covers.openlibrary.org/b/id/12425409-L.jpg"
   },
   {
     "id": "objectivec-learn-objective-c-on-the-mac",
@@ -6217,7 +6217,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://developer.apple.com/documentation/objectivec",
-    "coverImage": "https://developer.apple.com/favicon.ico"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "objectivec-apple-cocoa-documentation",
@@ -6227,7 +6227,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://developer.apple.com/documentation/",
-    "coverImage": "https://developer.apple.com/favicon.ico"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "clojure-clojure-for-the-brave-and-true",
@@ -6287,7 +6287,7 @@
     "category": "advanced",
     "edition": "1st Edition",
     "driveUrl": "https://www.manning.com/books/clojure-the-essential-reference",
-    "coverImage": "https://covers.openlibrary.org/b/id/7440852-L.jpg"
+    "coverImage": "https://images.manning.com/360/480/resize/book/d/68d30a9-7796-42f6-be7c-6d4a513b6c66/Borgatti-HI.png"
   },
   {
     "id": "clojure-professional-clojure",
@@ -6327,7 +6327,7 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://clojure.org/reference/documentation",
-    "coverImage": "https://clojure.org/images/clojure-logo-icon-256.png"
+    "coverImage": "/covers/reference.svg"
   },
   {
     "id": "clojure-clojuredocs",
@@ -6337,6 +6337,6 @@
     "category": "references",
     "edition": "Online Resource",
     "driveUrl": "https://clojuredocs.org/",
-    "coverImage": "https://avatars.githubusercontent.com/u/620509?s=200&v=4"
+    "coverImage": "/covers/reference.svg"
   }
 ]
diff --git a/web/lib/covers.ts b/web/lib/covers.ts
new file mode 100644
index 0000000..d9bb353
--- /dev/null
+++ b/web/lib/covers.ts
@@ -0,0 +1,33 @@
+import type { Book } from "./types";
+
+/** Shared cover art for documentation / reference entries. */
+export const REFERENCE_COVER_SRC = "/covers/reference.svg";
+
+const REFERENCE_EDITION =
+  /\b(online resource|official reference|official language)\b/i;
+
+const REFERENCE_TITLE =
+  /\b(documentation|\bdocs\b|language reference|style guide|reference manual|\bmdn\b|hexdocs|\bwiki\b)\b/i;
+
+/** Published books that are tagged Online Resource but should keep a real cover. */
+const PUBLISHED_ONLINE_EXCEPTIONS = new Set([
+  "Scala with Cats",
+  "Zionomicon",
+  "Creating Solid APIs with Lua",
+  "Functional Programming for Mortals with Scalaz",
+]);
+
+export function isReferenceCoverBook(
+  book: Pick<Book, "category" | "edition" | "title">,
+): boolean {
+  if (book.category === "references") return true;
+  if (PUBLISHED_ONLINE_EXCEPTIONS.has(book.title)) return false;
+  if (REFERENCE_EDITION.test(book.edition || "")) return true;
+  if (REFERENCE_TITLE.test(book.title || "")) return true;
+  return false;
+}
+
+export function coverSrcForBook(book: Book): string {
+  if (isReferenceCoverBook(book)) return REFERENCE_COVER_SRC;
+  return book.coverImage?.trim() || "";
+}
diff --git a/web/public/covers/reference.svg b/web/public/covers/reference.svg
new file mode 100644
index 0000000..e3e100c
--- /dev/null
+++ b/web/public/covers/reference.svg
@@ -0,0 +1,40 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="600" height="800" viewBox="0 0 600 800" role="img" aria-label="Reference">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0%" stop-color="#0f172a"/>
+      <stop offset="55%" stop-color="#1e293b"/>
+      <stop offset="100%" stop-color="#0b1220"/>
+    </linearGradient>
+    <linearGradient id="panel" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0%" stop-color="#f8fafc" stop-opacity="0.12"/>
+      <stop offset="100%" stop-color="#f8fafc" stop-opacity="0.04"/>
+    </linearGradient>
+    <linearGradient id="accent" x1="0" y1="0" x2="1" y2="0">
+      <stop offset="0%" stop-color="#38bdf8"/>
+      <stop offset="100%" stop-color="#818cf8"/>
+    </linearGradient>
+  </defs>
+
+  <rect width="600" height="800" fill="url(#bg)"/>
+  <rect x="36" y="36" width="528" height="728" rx="28" fill="url(#panel)" stroke="#94a3b8" stroke-opacity="0.35"/>
+
+  <!-- accent bar -->
+  <rect x="72" y="88" width="120" height="8" rx="4" fill="url(#accent)"/>
+
+  <!-- book / docs mark -->
+  <g transform="translate(180 250)">
+    <rect x="0" y="20" width="160" height="210" rx="14" fill="#e2e8f0"/>
+    <rect x="40" y="0" width="160" height="210" rx="14" fill="#f8fafc"/>
+    <rect x="40" y="0" width="18" height="210" fill="#cbd5e1"/>
+    <rect x="78" y="48" width="100" height="10" rx="5" fill="#94a3b8"/>
+    <rect x="78" y="78" width="84" height="10" rx="5" fill="#cbd5e1"/>
+    <rect x="78" y="108" width="92" height="10" rx="5" fill="#cbd5e1"/>
+    <rect x="78" y="138" width="70" height="10" rx="5" fill="#cbd5e1"/>
+    <circle cx="200" cy="188" r="28" fill="url(#accent)"/>
+    <path d="M190 188h20M200 178v20" stroke="#0f172a" stroke-width="4" stroke-linecap="round"/>
+  </g>
+
+  <text x="300" y="560" text-anchor="middle" fill="#f8fafc" font-family="Georgia, 'Times New Roman', serif" font-size="54" font-weight="700" letter-spacing="4">REFERENCE</text>
+  <text x="300" y="610" text-anchor="middle" fill="#94a3b8" font-family="ui-sans-serif, system-ui, sans-serif" font-size="22" letter-spacing="3">DOCS &amp; OFFICIAL GUIDES</text>
+  <text x="300" y="700" text-anchor="middle" fill="#64748b" font-family="ui-sans-serif, system-ui, sans-serif" font-size="16" letter-spacing="2">ULTIMATE PROGRAMMING BOOKS</text>
+</svg>