The Lost City of Z, a non-fiction book by David Grann, tells the story of Colonel Percy Fawcett, a British explorer who vanished while searching for an ancient Amazonian civilization. The book is told in first person and third person; it is both a Fawcett biography and a personal tale about the author's travels to the Amazon to solve the Fawcett mystery. The Lost City of Z is concerned with themes of obsession, the limits of knowledge, and challenging assumptions about the world.