At the Earth's Core Author:Edgar Rice Burroughs In their newly invented mechanical mole, David Innes and Abner Perry penetrate the world's core and travel 500 miles down toward the center of the Earth. Instead of meeting eternal fires, they break into a strange and terrifying world, the land of Pellucidar. Evolution has taken a strange turn and man is slave to the monstrous race of Mahars... more ».