Matthew Moseley has a passion for long-distance swims in sometimes treacherous waters. In the early morning darkness of June 27, 2021, he wades into the Green River and begins the first-ever 52-mile swim where its waters meet those of the Colorado River in Canyonlands National Park. Stroke by stroke, Moseley invites you on his journey, as he encounters expected and unexpected adventures along the way. He shares his unique connection to the rivers, lakes, and oceans he swims and the historical and literary luminaries who deepened his appreciation of life in, on, and around water. Facing his greatest test of endurance yet, he also confronts the harsh new reality of the climate crisis in the American West. As we follow Moseley on swimming adventures around the world-from New Orleans, the Caribbean, Costa Rica, the Colorado River, the Sea of Galilee, and points between-he becomes an Ambassador for Water, passing along essential lessons about adaptability and durability. He shows us why water-either too little or too much-will be the defining issue of our times. His account is a meditation on, a celebration of, and a love story with Earth's life-giving resource. Reading Soul is Waterproof is like being on Moseley's support boat as stories and characters unfold around every bend. Put your life vest on and buckle up.