>5. The Tangled Web - Written by Michal Zalewski, Director of Security at Google and author of afl-fuzz. This is the book to read alongside The Web Application Hacker's Handbook. Unlike many of the other books listed here it is a practical defensive book, and it's very actionable. Web developers who want to protect their applications without learning enough to become security consultants should start here.

I just finished this book last night, this is an invaluable resource.