The Smoky God (1908 novel)

The Smoky God, or A Voyage Journey to the Inner Earth is a 1908 novel by Willis George Emerson, relating what is purported to be a true account of Olaf Jansen, a Norwegian sailor, who travels with his father into the hollow earth through an entrance at the North Pole. The original editions featured illustrations of the cavern world by John Alonzo Williams.