Back to the Stone Age
by Edgar Rice Burroughs
Five hundred miles below the earth's surface lies another world — the world of eternal days and eternal horizons, where dinosaurs still roam, cavemen hunt, and forgotten horrors in the outside world still survive. Lieutenant von Horst, a member of the research expedition, was left behind in this lost land of Pelloucidar. "Back to the Stone Age" is a fascinating story of dangerous adventures he had with the cave girl he loved in that primitive unknown world.
