The first definitive natural history of North America’s Great Lakes – Earth’s largest freshwater ecosystem. The story of water passing through life as it flows across half a continent from Lake Superior to Lake Ontario and onto the Atlantic Ocean. These five giant lakes drain a massive watershed bordering Canada and the United States which contain nearly one-quarter of the world’s surface freshwater. Great Lakes Untamed reminds us of the value of clean freshwater and the incredible nature we still have to lose on a changing planet.