In the summer of 1869, young and fresh, Muir traveled through the Sierra Nevada with a shepherd and his flock. This book is his journal, and it, too, is young and fresh. Muir, who would become a legendary advocate for wilderness and the founder of the Sierra Club, always played down the dangers he faced. But this book is full, nevertheless, of bears. And charm. It reminds you of how much wildness we have lost.