Hey guys, here's a few good books i've read lately. Hope you can find them and enjoy them as much as I did.

Hackers Beware - Eric Cole (UNIX/Linux/Windows Security + Exploits)
Network Security Fundamentals - Peter Norton (X.25, Linux, WAN, LAN, etc..)
Java2 Platform - SAMS Publishing
Rebel Code - Glynn Moody (Linux and the opensource revolution)

-have a good one