Other Books
Real World Linux Security: R. Toxen, Prentice Hall (2003)
An excellent read. Lists hundreds of vulnerabilities and what to do
about them. Valuable for non Linux users too.
Windows 2003 Security Bible: B. Rampling, Wiley (2003)
Good example of a how-to book. Specific to WIN2003
The Art of Deception: K. Mitnick, Wiley (2002)
Mitnick is one of the most famous social engineers.
Must-read for those involved in broad security planning, and fun
for everyone.