I recommend this Sumo for Mixed Martial Arts book to those who want to improve their grappling." -- Lyoto "The Dragon" Machida, Former UFC light heavyweight champion Andrew Zerling has done us all a service by taking what has been commonly regarded as a compartmentalized martial sport, sumo, and allowing us a peek inside its history and principles and giving us the opportunity to see how rich this vein of information can be to inform the modern incarnation of MMA. -- Mark Hatmaker, Best-selling author of thirteen titles including the No Holds Barred Fighting series