Red Hat Enterprise Linux 6 Administration
Sander van Vugt
Professional Linux Kernel Architecture
Wolfgang Mauerer
Kali Linux Web Penetration Testing Cookbook
Gilberto Najera Gutierrez
Linux® Essentials
Richard Blum
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain