Here is another good one for you guys. I just went out and got the latest edition of Hacking Exposed/Network Security Secrets & Solutions by Foundstone ISBN# 0-07-219381-6.
http://www.amazon.com/exec/obidos/AS...223020-5732730
It's a realy good read so far. It also comes with a CD packed full of tools. I like the way the book is set up. It sets up a scenario then shows how to hack or exploit it. Then it gives a solution to secure or harden it. The book is most definitely not for the noob though.
Like I said though. The tools on the CD are a nice collection. It has one hel% of a password d/b on it. As well it has tools for win32 and *nix plaforms. If you want a good reference guide for IT security and to show the corperate types a thing or two. This is the book.