For David Goggins, childhood was a nightmare--poverty, prejudice, and physical abuse colored his days and haunted his nights. But through self-discipline, mental toughness, and hard work, Goggins transformed himself from a depressed, overweight young man with no future into a U.S. Armed Forces icon and one of the world's top endurance athletes. The only man in history to complete elite training as a Navy SEAL, Army Ranger, and Air Force Tactical Air...

While racing through the Gobi Desert in China and Mongolia, the author, a seasoned ultramarathoner, encounters a stray dog who, keeping pace with him for nearly 80 miles, gives him a new perspective on life, causing him to fight to bring her home with him with the help of strangers and a viral outpouring of assistance on the internet.