Applied Cryptography
Bruce Schneier
Cracking Codes with Python
Al Sweigart
The Everything Economics Book
David A Mayer
CompTIA Linux+ Guide to Linux Certification
Jason Eckert
Introduction to Sociology 2e
Heather Griffiths & Nathan Keirns & Gail Scaramuzzo & Susan Cody-Rydzewski & Eric Strayer & Sally Vyrain