The Book of PF, 3rd Edition: A No-Nonsense Guide to the OpenBSD ...
Peter N. M. Hansteen
Game Hacking: Developing Autonomous Bots for Online Games
Nick Cano
The C Programming Language
Brian W. Kernighan & Dennis M. Ritchie
Hacking: The Art of Exploitation, 2nd Edition
Jon Erickson
Head First Design Patterns
Eric Freeman & Elisabeth Freeman & Kathy Sierra & Bert Bates