WILD: From Lost to Found on the Pacific Crest Trail, by Cheryl Strayed. Knopf, 2012, 336 pp., $25.95 (hardcover) In this hugely entertaining book, Cheryl Strayed takes the redemptive nature of travel — a theme as old as literature itself — and makes it her own. For three months she hiked 1,100 miles (1,770 km) alone along the Pacific Crest Trail, a continuous wilderness undulating from Mexico to Canada over nine mountain ranges — the Laguna to the Cascades. She did it, she says, "in order to save myself."