River of Doubt - Candice Millard https://www.candicemillard.com/river-of-doubt.html https://www.candicemillard.com/river-of-doubt.html Covers Teddy Roosevelt'

River of Doubt - Candice Millard https://www.candicemillard.com/river-of-doubt.html https://www.candicemillard.com/river-of-doubt.html Covers Teddy Roosevelt's Amazon expedition. To the comment about "weren't people living in the Amazon" - read the book. The Brazilian government was scouting and mapping the terrain for the project of connecting the coasts with telegraph lines. This was uncharted territory and the chance of not returning was high. I cannot recommend enough.