Having read "Inside the Lion's Den" years ago, I was very happy when this book came out. It makes Shamrock's first book seem like an abridged version of this one.
As in the first book, the first part is autobiographical. In it, Shamrock goes in depth about his troubled childhood, his time on the American pro-wrestling circuit (including a detailed description of the Nasty Boys incident), his time in Japan, and his return to MMA fighting up to his fight with Kimo. Without a doubt, some of the accounts are embellished or one-sided, but I think any fan of MMA, especially the early days, will be pleased at the insights Shamrock gives. My biggest complaint, as a pro-wrestling fan, is the constant misspelling of wrestler's names, but I don't think that'll effect most readers.
The second part of the book is on submission fighting. This is MUCH more detailed, technique-wise, than "Inside", but is noticeably missing sections on training, strategy and nutrition which were found in the first book. This section starts with stance and mobility and moves on to striking, including basic defenses, combinations, and striking from the clinch. Next he addresses takedowns, both offensively and defensively. He covers shooting, takedowns out of the clinch, takedowns off of the wall, takedown defense, takedowns to counter strikes, and many of his techniques end in a submission hold of some sort, allowing the fighter to finish his opponent off. After that is groundfighting, which is really Ken's specialty. He addresses, by chapter, the top guard position, side control and it's variations, the mount, the rear mound (including variations), and the bottom guard. In each section, he gives striking and submission options, proper positional control, and usually a bit on mobility and escapes. Fans of leg locks will love this part of the book.
Considering the length and cost of the book, I'd recommend it primarily for those interested in both the history and techniques of MMA. Though he's lost a few steps in the ring, there's no doubt after reading the instructional section that Ken still knows the techniques that work in an MMA fight. An excellent follow-up to his first book, and a very good book overall.