"Special Ops" is one of the most useful security books I've read -- and my library includes 92 titles acquired since 2000. "Special Ops" is not "Hacking Exposed" with a white-and-camouflage cover. While the "Hacking Exposed" series is more assessment- and enumeration-centric, "Special Ops" spends more time on proper installation and deployment of services and applications. Most usefully, "Special Ops" succinctly and powerfully addresses topics neglected by other security books.