Mark Hatmaker is the author of Boxing Mastery, More No Holds Barred Fighting: Killer Submissions, No Holds Barred Fighting, and No 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.
Mark Hatmaker is the author of Boxing Mastery, More No Holds Barred Fighting: Killer Submissions, No Holds Barred Fighting, and No 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 l...