The Clinch (No Holds Barred Fighting)
Mark Hatmakeris the author ofBoxing Mastery,More No Holds Barred Fighting: Killer Submissions,No Holds Barred Fighting, andNo Holds Barred Fighting: Savage Strikes. He is the founder of Extreme Self Protection, a research body that compiles, analyzes, and teaches unarmed combat methods. He lives in Knoxville, Tennessee.