John Hemming was the director of the Royal Geographic Society in London from 1975 to 1996. In addition to The Conquest of the Incas, his sixteen books include Monuments of the Incas, The Search for El Dorado, and Tree of Rivers. He has a D. Litt doctorate from Oxford, and other honorary doctorates and fellowships.
Gary Tiedemann is a Florida and New York-based narrator, but learned how to act in Chicago's improv, sketch-comedy, and theater scene. He came to audiobook narration after voicing countless commercials and videos over a twenty-year voice-over career.