Despite the fact that this book is getting a bit outdated, it does manage to cover a wide range of security topics that many of the others skip completely. It's also written in a fairly entertaining style, so it's relatively easy to read despite its size. Covers alot of important newbie details like the reasoning for multiple partitions, tcp_wrappers, turning off services, etc. Some of the exploits and security tools are getting a bit old, so hopefully a new edition will be released soon. In general though, I would recommend this book to people looking to get some basic introductory security knowledge and aren't looking for a book describing the most bleeding-edge tools or exploits.