Network Security Essentials: Applications and Standards
William Stallings
Database System Concepts 6th Edition
Abraham Silberschatz & Henry Korth & S. Sudarshan
UMTS Networks: Architecture, Mobility and Services
Heikki Kaaranen & Ari Ahtiainen & Lauri Laitinen & Siamäk Naghian & Valtteri Niemi
Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
Think Bayes
Allen B. Downey