John Muir wrote many wonderful books about his travels, but one story -- about his long walk from San Francisco to Yosemite -- is one book he did not author himself. In April 1868, a very young John Muir stepped off a boat in San Francisco and inquired about the quickest way out of town. "But where do you want to go?" was the response, to which Muir replied, "Anywhere that is wild." Using Muir's personal correspondence and published articles, Peter...