"Maximum Security" is by far the best security related book for people interested in security who have a "basic" knowledge in computers. This book is good for sysadmins. Unfortunately, it allows for danger of malicious users to take advantage of the info. I can tell that this books was written by a "real" hacker. This individual(aka anonymous) has extensive knowledge of the internet, and makes it easy to understand for intermediate users(not in security, just basic computers). This book is a must have for anyone interested in computer security. For more advanced readers, get "Hacker Proof: The Ultimate Guide to Network Security" available at "www.amazon.com" the #1 source for computer books!