NATIONAL BESTSELLER • At once an incredible adventure narrative and a penetrating biographical portrait—the bestselling author of River of the Gods brings us the true story of Theodore Roosevelt’s harrowing exploration of one of the most dangerous rivers on earth. “A rich, dramatic tale that ranges from the personal to the literally earth-shaking.” —The New York Times The River of Doubt—it is a black, uncharted tributary of the Amazon that snakes through one of the…