Applied Cryptography
Bruce Schneier
Mission Python
Sean McManus
Malware Analyst's Cookbook and DVD
Michael Ligh, Steven Adair, Blake Hartstein, Matthew Richard
Let's Go!
Alex Edwards
CCNA Certification Practice Tests
Jon Buhagiar
Unauthorised Access
Wil Allsopp
Cryptography Engineering
Niels Ferguson & Bruce Schneier & Tadayoshi Kohno