The Lost City of the Monkey God: A True Story is a 2017 nonfiction book by Douglas Preston. It is about a project headed by documentary filmmaker Steve Elkins that used lidar to search for archaeological sites in the Río Plátano Biosphere Reserve of the Gracias a Dios Department in the Mosquitia region of eastern Honduras. The expedition was a joint Honduran-American multidisciplinary effort involving Honduran and American archaeologists, anthropologists, engineers, geologists, biologists and ethnobotanists.