Since the days of conquistador Hernán Cortés, rumors have circulated about a lost city of immense wealth hidden somewhere in the Honduran interior. In 1940, swashbuckling journalist Theodore Morde returned from the rainforest with hundreds of artifacts and an electrifying story of having found the Lost City of the Monkey God --- but then committed suicide without revealing its location. Three quarters of a century later, Douglas Preston joined a team of scientists on a flight that revealed the unmistakable image of a sprawling metropolis, tantalizing evidence of not just an undiscovered city but an enigmatic, lost civilization. But it wasn't until they returned that tragedy struck: Preston and others found they had contracted a horrifying, sometimes lethal --- and incurable --- disease.