Pluggable Authentication Modules
Kenneth Geisshirt
Linux Networking Cookbook
Carla Schroder
Practical Python Security
Dennis Byrne
The Wireshark Field Guide
Robert Shimonski
Burp Suite Cookbook
Sunny Wear
Mastering Linux Network Administration
Jay LaCroix
Mastering Linux Administration
Alexandru Calcatinge & Julian Balog
Offensive Shellcode from Scratch
Rishalin Pillay
The Complete Metasploit Guide
Sagar Rahalkar