If you know nothing about hacking, this book might be a good start. However, there are plenty of web sites that will do a better job (and they are free).
The reputation of the authors made me hope for a much more in depth look at hacking techniques. Instead, they touch on most subjects way too lightly, and making several failed attempts in explaining some basic networking concepts.
What I thought to be the most value when reading, was the promise of a website with all the links mentioned in the book. As of today, this site is "under construction" without any useful information at all! (www.internettradecraft.com)
In short, if you want to get a basic feel for what hacking is about, and want to get it without using a webbrowser, read this book. If you're looking to expand your knowledge or get definate answers, look elsewhere.