At the Earth's Core

At the Earth's Core is a 1914 fantasy novel by Edgar Rice Burroughs, the first in his series about the fictional "hollow earth" land of Pellucidar. Pellucidar is inhabited by prehistoric creatures of all geological eras, and dominated by the Mahars, a species of flying reptile both intelligent and civilized, but which enslaves and preys on the local stone-age humans. Innes, David Innes is a mining heir who finances the experimental "iron mole," and Perry are captured by the Mahars' ape-like Sagoth servants and taken with other human captives to the chief Mahar city of Phutra. Among their fellow captives are the brave Ghak, the Hairy One, from the country of Sari, the shifty Hooja the Sly One and the lovely Dian the Beautiful of Amoz.