Computer Security books?

Hey I work for a university so i figured I would take out a book on security.
What are some good ones that you've all read. something intermediate to advanced, any subject in security
thanks,
Thekit

Hacking Exposed by Stuart McClure, Joel Scambray, George Kurtz

http://www.amazon.com/exec/obidos/AS...020874-1760027

One of, if not The Best...

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I think my old book lists have some liks to Security books !