"Hell Exists. In Tibet, while guiding trekkers to a holy mountain, Ike Crockett discovers a bottomless cave. When his lover disappears, Ike pursues her into the depths of the earth.... In a leper colony bordering the Kalahari Desert, a nun and linguist named Ali von Schade unearths evidence of a proto-human species and a deity call Older-than-Old.... In Bosnia, Major Elias Branch crash-lands his gunship near a mass grave and is swarmed by pale cannibals terrified of light...."--BOOK JACKET. "So begins mankind's realization that the underworld is a vast geological labyrinth riddling the continents and seabeds, one inhabited by brutish creatures who resemble the devils and gargoyles of legend. With all of Hell's precious resources and territories to be won, a global race ensues. Nations, armies, religions, and industries rush to colonize and exploit the subterranean frontier."--BOOK JACKET. "A scientific expedition is launched westward to explore beneath the Pacific Ocean floor, both to catalog the riches there and to learn how life could develop in the sunless abyss. Is there a natural explanation, as the scientists hope? Or is there a true supernatural basis? Are the "demons" part of our evolutionary family tree? Is their enigmatic leader merely a freak genius, or could he be the legendary Satan?"--BOOK JACKET.