The Linux Command Line
William E. Shotts, Jr.
Web Penetration Testing with Kali Linux
Gilberto Najera-Gutierrez & Juned Ahmed Ansari
Metasploit for Beginners
Sagar Rahalkar
Red Hat Enterprise Linux 6 Administration
Sander van Vugt
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain