Bulletproof SSL and TLS: Understanding and Deploying SSL/TLS ...
Ivan Ristic
Modsecurity 2.5
Magnus Mischel
TCP/IP Illustrated: Volume 1 The Protocols
W. Richard Stevens & Kevin R. Fall
TCP/IP Ilustrated (1)
The Amazon Way
John Rossman
PMP: Project Management Professional Exam Study Guide
Kim Heldman
PMP® Exam Practice Test and Study Guide, Ninth Edition
J. Leroy Ward, Pmp, Pgmp & Ginger Levin