"In the Depths of the Planet" is an exciting science fiction book by the American writer Edgar Rice Burroughs, which transports readers to the incredible world of the Earth's inner crust. The main character, David Ingalls, together with the scientist Dr. Perry accidentally falls through a volcano into a mysterious world where giant dinosaurs and mysterious creatures rule. Encounters with wild warriors, danger and adventure question the existence of civilization. Will the heroes be able to find a way home and save themselves from unseen dangers?