C++ Crash Course
Josh Lospinoso
Ethical Hacker’s Penetration Testing Guide
Samir Kumar Rakshit
Linux Advanced Routing and Traffic Control HOWTO
Gregory Maxwell & Remco Mook & Martijn Oosterhout & Paul Schroeder & Jasper Spaans & Bert Hubert
Cloud Attack Vectors
Morey J. Haber & Brian Chappell & Christopher Hills
Pluggable Authentication Modules
Kenneth Geisshirt