With the African continent engulfed by World War II, John Clayton, Lord Greystoke, abandons his role as Lord of the Jungle in order to combat the spreading Nazi menace. Flying a P-40 Tomahawk warplane, Clayton is sent on his first mission: to rescue the missing British Military Intelligence officer code-named Ilex. But the daring task plunges him into his savage past after he’s forced down in a lost land that seems hauntingly familiar. 

Tarzan's beloved mate, Jane, has been kidnapped, and the furious ape-man will let nothing stand in the way of rescuing her - not even a sinister safari whose target is Tarzan himself. With fierce Masai trackers leading the chase, a trio of white hunters are hellbent on capturing the Jungle Lord. But as the pursuers, and their uncanny half-human tracker, close in from behind, Tarzan races toward even greater danger ahead. For the trail leads to a bizarre, long-forgotten land boasting a multitude of strange and terrifying mysteries: the City Built by God, the Hideous Hunter, and more.

Stranded on the planet Venus, known as Amtor to its inhabitants, Earthman Carson Napier has faced countless perils to win the hand of the courageous Duare, his beloved princess, and to be bestowed with high honors and the title of prince in the powerful nation of Korva. But when a new threat strikes from out of the skies, Carson discovers his own arrival on the planet years ago may have unknowingly led the mysterious enemy to attack.

The only female student in Cambridge University’s medical program, Jane Porter is far more comfortable in a lab coat dissecting corpses than she is in a corset and gown sipping afternoon tea. A budding paleoanthropologist, Jane dreams of traveling the globe in search of fossils that will prove the evolutionary theories of her scientific hero, Charles Darwin. When dashing American explorer Ral Conrath invites Jane and her father to join an expedition deep into West Africa, she can hardly believe her luck.

Chris West’s deadly prowess with his weapon of choice had earned him the name Red Axe in the Stone Age world of Pellucidar at the Earth’s core. Sentenced to die along with the woman he loved by the merciless Mahars, West had fought his way free of the lethal laboratories and ghastly arenas of their underground city. Now he must carve a path for his small band of fugitives through a primordial landscape teeming with monstrous beasts and brutish men bent on their destruction.