This book is a no nonsense, practical and effective approached to self defense. It doesn't teach you a 'quick fix' self defense against a willing partner, but gives you the basics behind the techniques. It shows which part of your body can be used as a weapon, their ranges, which one is effective to which target, the correct structure to deliver them and a lot more.
It will teach you Wing Chun principles, footwork, hand techniques, using both hands simultaneously, using minimal force, cutting angles for optimal leverage, destroying structure, overwhelming counter-attacks, how to apply Chin Na (joint locking) effectively to immobilize your assailant, among others...