Linux® Command Line and Shell Scripting Bible
Richard Blum
Java™ Illuminated
Anderson, Julie & Franceschi, Hervé J.
Red Hat Enterprise Linux 6 Administration
Sander van Vugt
The Hardware Hacker
Andrew Bunnie Huang
CCNA Certification Practice Tests
Jon Buhagiar
Unauthorised Access
Wil Allsopp
Cryptography Engineering
Niels Ferguson & Bruce Schneier & Tadayoshi Kohno