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.

As the steel-clawed Leopard Men look for victims for their savage rites, the secret cult strikes terror into the hearts of all the villagers. Only Orando of the Utengi dares to declare war on them. And with Orando goes Tarzan of the Apes—but a strangely changed Tarzan, who now believes that he is Muzimo, a spirit or demon who was Orando’s ancestor. But there are traitors among Orando’s people. And in the village of the Leopard Men is Kali Bwana, a young American woman who has come to Africa to find a missing man. Only Tarzan can save her...

A great safari comes to Africa to make a movie, struggling across the veldt and through the jungle in great ten-ton trucks, equipped with all the advantages of civilization. But now it is halted, almost destroyed by the poisoned arrows of the savage Bansuto tribe. There is no way to return. Ahead lies the strange valley of diamonds, where hairy gorillas live in their town of London on the Thames, ruled by King Henry the Eighth. And behind them comes Tarzan of the Apes with the Golden Lion, seeking the man who might have been his twin brother in looks—though hardly in courage!

After Tarzan departs Southern California following a visit with a dear friend, bandits mysteriously dressed as cowboys straight out of the Old West waylay his train and make off with a precious Native American artifact—taking the daughter of the relic’s owner hostage in the process. Now Tarzan must set off on foot from the wrecked and twisted ruins of the train in pursuit of the criminals, making his way across the American Southwest, a land as different from his jungle homeland as can be imagined. But as Tarzan closes in on his prey, a ruthless killer follows close at his heels.

When Carson Napier's giant rocket crash-lands on the planet Venus, he knows that there will be no return to Earth for him. His only option: find a way to survive until other Earth rockets can reach him—if they can! Beneath the eternal clouds, contrary to everything science predicted, Carson finds a race of strange people inhabiting trees that make the giant redwoods of California look like mere saplings.