From the meadows of Scotland to the farms of Wisconsin, from the swamps of Florida to the Alaskan tundra, John Muir loved the land. Born in 1838, he was a writer, a scholar, an inventor, a shepherd, a farmer, and an explorer, but above all, he was a naturalist. John Muir was particularly devoted to the high cliffs, waterfalls, and ancient giant sequoia trees that, through his careful influence, were set aside as the first national park in America - Yosemite. Here is the life story of the man who, moved by a commitment to wilderness everywhere, founded the Sierra Club in 1892, a conservation group that carries on his crucial work to this day.