Theory of Computation
George Tourlakis
CEH Certified Ethical Hacker Study Guide
Kimberly Graves
Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
The Hitchhiker's Guide to the Galaxy: Life, the Universe and ...
Douglas Adams
The Hitchhiker's Guide to the Galaxy (1)
Ikev2 Ipsec Virtual Private Networks: Understanding and Deploying ...
Graham Bartlett & Amjad Inamdar