"From the New York Times bestselling and award-winning author of the epic adventure tale The Emerald Mile comes the most dramatic and deeply moving account ever of walking the Grand Canyon, a highly dangerous, life-changing 750-mile trek. The Grand Canyonis an American treasure, visited by more than 6 million people a year, many of whom are rendered speechless by its vast beauty, mystery, and complexity. Now, in A Walk in the Park, author Kevin Fedarko...