The Book of PF: A No-Nonsense Guide to the OpenBSD Firewall
Peter N. M. Hansteen
C Programming: A Beginner's Course
Noel Kalicharan
Unix and Linux System Administration Handbook 5th Edition
Evi Nemeth & Garth Snyder & Ben Whaley & Trent Hein
Database System Concepts 6th Edition
Abraham Silberschatz & Henry Korth & S. Sudarshan
Professional Java for Web Applications
Nicholas S. Williams
Java EE 7 First Look
Ndjobo Armel Fabrice
Java 9 High Performance
Mayur Ramgir
Beginning Java With WebSphere
Robert W. Janson