Principles are the reasons why techniques work… or don’t. There are hundreds of thousands of techniques, but they all rely on a rather small set of principles: Breaking the balance, distributing your weight, conserving energy, applying leverage… Once you know and consider the major principles at the back of grappling techniques, new techniques change into easier to be informed, all techniques change into clearer, and your ability to make the techniques work for you are going to increase as well. Understanding HOW, WHY, and WHEN the moves work will bring your grappling to a new level. Every decent grappling book will cover some principles along side techniques, but I have never found a book explaining principles and concepts into any kind of depth. This book is meant to bridge that gap and concentrates on principles and concepts, along side explanations, examples and illustrations. Even if my own background is in Judo, BJJ and Karate, these principles are common to all grappling arts, from Judo and BJJ to Sambo, Wrestling, Catch, Luta Livre, and so forth. I hope you are going to find value in it. There are also added a couple bonus chapters in this edition covering fundamentals of anatomy and strategy for grapplers. If you have an interest in my take on these subjects, please let me know.