"The Hidden People" is a story of adventure. It relates the experiences of two Americans who go in search of - and locate - the lost treasure of the Incas.<br><br>The quest takes the two, accompanied by the giant negro, Moses, whom they discover on the way, into some of the most remote and least-known parts of the Peruvian Andes. Along the route they come face to face with many of the wild denizens of the jungle, both human and animal.<br><br>Some of the places touched upon in the course of the story, together with their inhabitants, are assumed; for instance, the arid island and the hidden valley. But the vast majority of descriptions of people and their manners and dress; animal stories and descriptions; and mention of fish, insects, and vegetation are true to life.