From the author of the bestseller Eat and Run, a thrilling memoir about his grueling, exhilarating, and immensely inspiring 46-day run to break the speed record for the Appalachian Trail. Scott Jurek is one of the world's best known and most beloved ultrarunners. Renowned for his remarkable endurance and speed, accomplished on a vegan diet, he's finished first in nearly all of ultrarunning's elite events over the course of his career. But after two decades of racing, trainin