Best Linux Security Books?

RyuMaou asks: "I'm about to move a small company from an old, ailing Windows server to some flavor of Linux and I want to make sure they're proprietary information is safe. Here's the problem: I've only run Linux as an application server, behind the firewall, in a Novell environment. Time is short and I have limited resources and want to read at least one really great book on Linux security, then follow that up with some good reinforcement. I know the information is mostly available on the Internet for free, but I like reading actual books, not printouts. So, if you had to pick five books, or fewer, on Linux security, what would you read?"

Comments

There, Their, They're

[Saeed al-Sahaf]

...I want to make sure they're proprietary information is safe...

There - "There is something wrong with the grammar in the story."
Their - "It's their problem they don't know any better."
They're - "They're going to go down to the pub after installing Linux."

Use Gentoo

[jmazzi]

Although I don't have a book to recommend, I can offer this advice. Use Gentoo. It's model is pretty secure to start with. You only install what you need, not what the distro thinks you need.