Hacking VoIP: Protocols, Attacks, and Countermeasures
Himanshu Dwivedi
Jenkins Continuous Integration Cookbook
Alan Berg
Software Libre Para Una Sociedad Libre
Richard M. Stallman
Web Crawling and Data Mining With Apache Nutch
Zakir Laliwala & Abdulbasit Fazalmehmod Shaikh
Network Security: A Practical Approach
Jan L. Harrington