A very interesting book! Anyone who practices the tameshiwari will thoroughly enjoy this book, and will no doubt get something out of it. This is one of the very few teach-yourself books on the market of any value, and of them one of the most valuable; you'll love this one. Most schools these days won't have anything to do with breaking (and have a pretty long list of empty reasons why). If you're determined to learn, then you're on the right track and this book is a good place to start.
This book is the most in-depth book on Karate Breaking Techiniques I have ever found. I have never before found such extensive information on this subject compiled in one place before. If you are looking to master breaking techniques I would definetly recommend this book. This book gives extensive tips and secrets that has helped me go from an average competitor to constantly placing in the top 3 in breaking competitions.