Korak the Killer, jungle-raised son of Tarzan of the Apes, sets off into the wilds of the prehistoric world at the Earth’s core to rescue his daughter Suzanne Clayton, who has gone missing in the mysterious Land of Awful Shadow. But when the airship O-220 is hijacked, Korak and his Mangani friend Akut are stranded and must fight their way across the savage lands and seas of Pellucidar. Meanwhile, Korak’s mate Meriem risks everything in a perilous gambit to quickly reach the inner world.

The drums boom forth an incredible message from tribe to tribe—Tarzan, Lord of the Jungle, has become an enemy to all, stealing and enslaving their women…as well as the daughter of an English millionaire, who offers a princely reward for her recapture and Tarzan’s death. Certainly her captor told Sandra Pickerall that he was Tarzan…but he also told her he was God… Tarzan follows their trail with one thought in mind—to pursue and destroy the man who has stolen his name and made it infamous in the jungle world he loves.

Barsoom is dying, its atmosphere thinning with each passing year, the seas that once flourished upon its surface dried up eons ago. When warrior-scientist Dat Voga is asked to become Helium’s ambassador to distant cities that may provide a desperate chance at life for the people of Barsoom, he leaps at the opportunity. But even as this new hope dangles on a thread, a madman seeks to hasten the Red Planet’s doom—and Dat Voga is hurled headlong upon an odyssey across the chasm of Time itself!

Hidden in the far South Pacific lies the lost island continent of Caprona, forgotten by history and time itself. In the year 1836, Sicilian Captain Fausto Caproni and his sister Marina lead a voyage across the raging seas to rediscover the fabled land first sighted by their grandfather—only to plunge into a terrifying tropical world known to its inhabitants as Caspak, thriving with giant carnivorous lizards and bestial tribesmen from the dawn of time.

In the wild, unexplored coastal jungles of West Africa lives a wild human boy named Tarzan, the adopted son of a tribe of fierce almost-human anthropoid apes - but in reality, the unknown heir of a wealthy and titled English noble family. Then one day, a small party of American treasure-seekers is marooned on Tarzan's beach, including a lovely Baltimore belle named Jane Porter.