Hal and Roger are on a special mission to find and collect pearls from a secret lagoon in the Pacific. They worry about the crew and passengers of the Lively Lady and don't know who they can trust.

Hal and Roger Hunt crash-land into the middle of a pioneering expedition to the unmapped regions of the greatest jungle on earth: the Amazon. And when their mission to explore the uncharted territory of the Pastaza River goes off course... it's the survival of the fittest.

Hal and Roger Hunt are colder than they've ever been in their lives, up among the ice floes of Greenland. This harsh land holds many dangers, from killer whales to grizzly bears, but an evil man may turn out to be the deadliest threat the boys have to face.

Hal & Roger have a problem. Big game poachers threaten to wipe out the inhabitants of the world's largest national park. They capture the gang red-handed, but have no idea who the leader is. They must find a way to stop him before the park is destroyed.

A reissue of Willard Price's classic adventure series set in the animal kingdom.

Hal and Roger Hunt are on the trail of a vicious man-eating leopard. Yet they are also being hunted themselves, by a merciless band of killers known as the Leopard Society. Can they trust their own tracker, Joro, despite knowing that he has pledged to lead them to their deaths?

A reissue of Willard Price's classic adventure series set in the animal kingdom.

Hal and Roger Hunt dive straight into danger on a specimen-collecting trip to Undersea City. But it's not just sharks and killer whales the brothers have to fear when they are plunged into the depths of another adventure.

A reissue of Willard Price's classic adventure series set in the animal kingdom.

Hal and Roger Hunt are hoping to have a whale of a time when they agree to join the crew of a whaling ship. But as they begin working for the evil Captain Grindle, face dangerous battles with sharks, and then find themselves shipwrecked, the boys realise they're about to have a much bigger adventure than they bargained for.

A reissue of Willard Price's classic adventure series set in the animal kingdom.

Hal and Roger Hunt are in India, investigating rare and dangerous animals for their father. But on the trail of the rare white tiger, high in the Himalayas, disaster strikes and the brothers realise they are walking into the jaws of death.

Hal and Roger Hunt are in New Guinea, the most wild and savage island in the world. But their adventure becomes even more deadly when the brothers discover that man-eating crocodiles and deadly snakes aren't the only things after their blood.

Hal and Roger Hunt embark on an earth-shattering expedition when they join forces with world-famous volcanologist Dr Dan Adams. And as their ground-breaking research of the volatile Pacific volcanoes hots up, the brothers' mission erupts into an awesome adventure...