Two friends, zero preparation, one dream. From the author of the beloved bestseller The Emerald Mile, a rollicking and poignant account of the epic misadventure of a 750-mile odyssey, on foot, through the heart of America's most magnificent national park and the grandest wilderness on earth. A few years after quitting his job to follow an ill-advised dream of becoming a guide on the Colorado River, Kevin Fedarko was approached...