CCNA 200-301 Official Cert Guide, Volume 2
Wendell Odom
Professional Linux Kernel Architecture
Wolfgang Mauerer
Cryptography Engineering
Tadayoshi Kohno & Bruce Schneier & Niels Ferguson
Free Executive Summary
Leona Coffee
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain