# Vault Book Vault Book is an interactive and text-first guide to DeFi lending and borrowing vaults. The current release is Euler-first and explains vault structure, risk controls, parameters, oracle design, liquidations, lender risk, borrower risk, security posture, UX flows, and integration surfaces. Canonical URL: https://www.thevaultbook.org Text guide: https://www.thevaultbook.org/guide Full AI-readable guide: https://www.thevaultbook.org/llms-full.txt Sitemap: https://www.thevaultbook.org/sitemap.xml Current protocol coverage: - live: Euler — Modular credit vaults - planned: Morpho — Optimized lending markets - planned: Aave — Pooled liquidity markets Recommended entrypoint for crawlers and agents: - Read /guide for the crawlable HTML overview. - Read /llms-full.txt for the plain-text chapter map.