Modsecurity 2.5
Magnus Mischel
Gray Hat Hacking the Ethical Hacker's Handbook, Fourth Edition
Daniel Regalado & Shon Harris & Allen Harper & Chris Eagle & Jonathan Ness & Branko Spasojevic & Ryan Linn & Stephen Sims
The Complete Plato
Plato
Computer Graphics, C Version
Donald Hearn & M. Pauline Baker
Time Management for System Administrators
Thomas A. Limoncelli
RT Essentials
Richard Foley