About the Author

David Goggins is a retired Navy SEAL and has competed in more than sixty ultra-marathons, triathlons, and ultra-triathlons, setting new course records and regularly placing in the top five. A former Guinness World Record holder for completing 4,030 pull ups in seventeen hours. The only man in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force Tactical Air Controller, he went on to set records in numerous endurance events, inspiring Outside magazine to name him, "The Fittest (Real) Man in America".