Open Horizons is Olson's autobiography, and in it he recalls his youth on a remote Wisconsin farm, his summers as a wilderness canoe guide, his thousands of miles of travel through the wilds of the United States and Canada, and his decades-long conservation battles. Throughout, Olson makes a compelling case for preserving the wilderness. He puts forth his own life as an example of how nature can have a spiritual effect on the human soul, and proposes diligence on behalf of those who fight to conserve our forests, wetlands, and dunes. ( )