I enjoyed this book. They call it a knife fighting book, but it's actually just prison fighting 101. Not an exaggeration, either, the author learned his martial art in Folsom Prison. As far as knife fighting is concerned, Pentecost criticizes other schools of thought more than he explains his own, and a lot of what he calls “self-defense“ would actually be murder. I enjoyed this quick read, but I will not be adding these techniques to my routine.