Using and Administering Linux: Volume 1
David Both
Advanced Penetration Testing
Wil Allsopp
Free Executive Summary
Leona Coffee
Intro to Java Programming, Comprehensive Version
Y. Daniel Liang
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain