Mark Hatmaker is the bestselling author of the No Holds Barred Fighting Series, the MMA Mastery Series, No Second Chance and Boxing Mastery. He has sold more than 200,000 books and produced 40 instructional videos. His resume includes extensive experience in the combat arts including boxing, wrestling, Jiu-jitsu and Muay Thai. He is a highly regarded coach of professional and amateur fighters, law enforcement officials, and security personnel. Hatmaker founded Extreme Self Protection (ESP). ESP holds numerous seminars throughout the country each year including the prestigious Karate College/Martial Arts Universities in Radford, Virginia.