Willard Price - Böcker

'It's a lost world out there'. Hal and Roger Hunt sink deep into danger when a specimen-collecting trip takes them into the lost world of the South Seas. But the deep-sea trawl has a hidden agenda - a top secret mission for Professor Stuyvesant, and his scientific experiments in Pearl Lagoon...

'No one has ever come out alive'. 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.

'Adrift in a savage land of ice and snow'. 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.

'It's war. And right now we're losing it.'Hal and Roger Hunt fly straight into the jaws of death when they join warden Mark Crosby in Tsavo, an African park where poaching is big business. And with a gang leaving behind a blood-stained trail of terror and torture, the heat is on for the brothers to solve the string of mysterious murders - before they too become victims . . .

'This man has promised to kill...' 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?

'No use fooling yourself. The sharks got him.'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.

'The devil has killed our people'. 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.

'Fountains of fire, explosions ...it's hell let loose.' 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...

'Never trust sharks . . .'Hal and Roger Hunt dive into danger when they join the Oceanographic institute as part of an underwater operation in the South Seas. And it's sink or swim for the intrepid brothers when their aquatic adventures bring them face to face with a foe even more deadly than the sea creatures of the deep . . .

'You are walking into the jaws of death.' Hal and Roger Hunt are on an awesome African adventure to track down the rare great white elephant. The brothers coolly tackle their task - despite doom-laden prophecies from mumbo, a Watussi chieftain - and as the temperature rises...the danger-level intensifies.

The human bait was the boys themselves...Hal and Roger Hunt have been sent on a terrifying mission - they must save the population of Mtito Andei from a man-eating lion. But the 'King of the Beasts' isn't the only thing trying to kill the boys...Have the brothers bitten off more than they can chew this time?

'You stand rooted to the spot or you run like mad.' Hal and Roget Hunt head off for another challenging mission - this time to search for gorillas in the Congo jungle. But when the boys stumble across the evil trade in baby gorillas, someone seems determined to silence them once and for all.