Linux Pocket Guide, 3E
Daniel J. Barrett
Honoring the Code
Barton, Matt
Advanced Penetration Testing
Wil Allsopp
Linux in a Nutshell
Arnold Robbins & Ellen Siever & Stephen Figgins & Robert Love
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain