Linux Bible
Christopher Negus
Free Executive Summary
Leona Coffee
Cryptography Engineering
Tadayoshi Kohno & Bruce Schneier & Niels Ferguson
grep Pocket Reference
John Bambenek
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain