The Smoky God, or A Voyage Journey to the Inner Earth is a book presented as a true account, which describes the adventures of Olaf Jansen, a sailor who sailed with his father through an entrance to the Earth's interior at the North Pole. For two years Jansen lived with the inhabitants of an underground network of colonies who, Emerson writes, were 12 feet tall and whose world was lit by a "smoky" central sun.