docs(book): Update README with final Part IV statistics

- Chapter 19: 3,537 → 13,400 words (Beanstalk attack, $633M disasters)
- Chapter 20: 3,122 → 11,074 words (Iron Finance $2B collapse)
- Part IV DeFi/MEV: 59,298 → 77,113 words (+30%)
- Total textbook: 157,000 → 175,000 words (+11%)
- All DeFi chapters now disaster-driven with production systems
- Total disasters documented (Ch 15-20): $3.5B+ across 6 chapters

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: 0xrinegade

docs/book/README.md

@@ -10,7 +10,7 @@ This textbook provides comprehensive coverage of algorithmic trading strategies,
 
 **Level:** Graduate (MFE, MQF, MS in Computational Finance)
 **Prerequisites:** Calculus, probability theory, basic programming
-**Total Content:** ~157,000 words across 16 chapters (13 original + 3 NEW foundational chapters)
+**Total Content:** ~175,000 words across 16 chapters (13 original + 3 NEW foundational chapters)
 **Academic References:** 156 peer-reviewed papers and textbooks (134 original + 22 NEW)
 
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@@ -84,10 +84,10 @@ Every chapter shows you **exactly** how these disasters could have been prevente
 | [16](16_memecoin_momentum.md) | Memecoin Momentum Trading | 13,688 | SQUID honeypot, SafeMoon/Mando/APE/FEG disasters, production system, PEPE2 example |
 | [17](17_whale_copy_trading.md) | Whale Tracking and Copy Trading | 10,891 | DeFi Degen Sybil, Nansen/3AC/Pump.fun/wash trading disasters, Sybil-resistant system |
 | [18](18_mev_bundle_sniping.md) | MEV Bundle Construction | 16,072 | Black Thursday zero-bid, $208M+ MEV disasters, production bundle system, 700+ lines OVSM |
-| [19](19_flash_loan_sniping.md) | Flash Loan Arbitrage | 3,537 | Uncollateralized lending, attack patterns, multi-protocol |
-| [20](20_liquidity_pool_sniping.md) | Liquidity Pool Analysis | 3,122 | AMM math, impermanent loss, concentrated liquidity |
+| [19](19_flash_loan_sniping.md) | Flash Loan Arbitrage | 13,400 | Beanstalk $182M governance attack, $633M flash loan disasters, production system, worked example |
+| [20](20_liquidity_pool_sniping.md) | Liquidity Pool Analysis | 11,074 | Iron Finance $2B death spiral, impermanent loss, AMM math, concentrated liquidity |
 
-**Subtotal:** 59,298 words
+**Subtotal:** 77,113 words
 
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