The River of Doubt: Theodore Roosevelt's Darkest Journey

This book by Candice Millard came up once on Lex Fridman in the episodes we index. That mention was a genuine on-air recommendation, not just a passing reference. The people who brought it up: Paul Rosolie. Every occurrence below links to the episode page and to the exact second it was said on YouTube.

At once an incredible adventure narrative and a penetrating biographical portrait, The River of Doubt is the true story of Theodore Roosevelt's harrowing exploration of one of the most dangerous rivers on earth.The River of Doubt--it is a black, uncharted tributary of the Amazon that snakes through one of the most treacherous jungles in the world.