Mark Hatmaker is the author of "No Holds Barred Fighting" and "More No Holds Barred Fighting". He is the founder of Extreme Self Protection, a company that compiles, analyses, and teaches unarmed combat methods. He lives in Knoxville, Tennessee.

"A great book on boxing techniques from training, strategy, defense, and punching that could take a person who has never laced up a pair of gloves and teach him to be an effective fighter." -- USA Boxing News on Boxing Mastery

"Focuses on the core aspects of grappling used inside the Ultimate Fighting Championship Octagon. In short you'll learn how to fold a man up like a cheap suit." -- Maxim magazine on No Holds Barred Fighting