Web3 Security Essentials: Protecting Assets and Code

In Web3, mistakes are permanent and attackers are always watching. Web3 Security Essentials: Protecting Assets and Code is a grounded, no-nonsense guide to understanding how things actually break—and how to prevent that damage before value is lost.
This book is written from a defender’s perspective. It focuses on real attack patterns seen in smart contracts, wallets, bridges, and protocols—not abstract theory. Readers learn how incentives, open-source code, and immutability change the security game entirely.
Rather than overwhelming with tools, the book sharpens security judgment. It explains why many projects fail despite audits, how small design errors cascade into catastrophic losses, and why security is as much about thinking clearly as writing code.
Inside this book, readers will explore:
• How Web3 threat models differ from traditional security
• Why smart contracts fail in predictable ways
• How attackers exploit logic, not just bugs
• How to protect keys, assets, and contract state
• Why security must be continuous, not one-time
Written in a sharp, practitioner-oriented style, this book is ideal for developers, auditors, founders, and serious builders. Web3 Security Essentials helps readers think defensively in an environment where trust is code—and failure is irreversible.