Free Executive Summary
Leona Coffee
Metasploit
David Kennedy & Jim O'Gorman & Devon Kearns & Mati Aharoni
Linux® Essentials
Richard Blum
grep Pocket Reference
John Bambenek
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain