README: feature Agent Memory Made Simple in the book section

[NirDiamant]

The 📖 book section of this README was promoting RAG Made Simple only — this repo's own companion book wasn't mentioned.

This PR:

• Leads with Agent Memory Made Simple (the 464-page companion to these 30 notebooks): direct-from-author link plus an Amazon/Kindle-Unlimited option (Amazon link carries an Attribution tag so channel conversion becomes measurable)
• Keeps RAG Made Simple as a compact series cross-sell line with the existing RAGKING code
• Uses the same click-tracker pattern as every other link in this README

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Replaced the “Go deeper on RAG” section with a new “The book of this repo” section.
  • Added links to Agent Memory Made Simple and RAG Made Simple.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 5415fa0c-87b0-4283-a51c-973ce74b584d

📥 Commits

Reviewing files that changed from the base of the PR and between b4b2770 and 63992e1.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

README.md replaces the “Go deeper on RAG” section with “The book of this repo.” The new section promotes Agent Memory Made Simple and adds direct purchase, Amazon/Kindle, and RAG Made Simple links.

Changes

Documentation update

Layer / File(s)	Summary
Book promotion section README.md	The README now promotes Agent Memory Made Simple and includes purchase, Amazon/Kindle, and related-book links.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to 63992

This localized README update changes book links and promotional wording only; no actionable merge-blocking risk remains after normal checks and review.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the README change but omits the required template sections, checklist, technique classification, and test instructions.	Use the repository template and complete Summary, Type of change, Technique(s) affected, Checklist, and Test instructions.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the README change and the addition of Agent Memory Made Simple.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch promote-agent-memory-book

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