Since there is the word "Hacker" in my blog name, I suppose I feel obligated to share a few links to sites hosting e-books about "hacking." I doubt these books will help any ;) ... the second link has a ton of outdated information.

First...
Second...

I'll update this one as more links come in. If you know of any sites that host e-books in a directory like this, post it in a comment, please ;)