Adventure Double: "Amazon Adventure", "Diving Adventure" (Adventure Double) (Paperback)

Willard Price's rip-roaring adventures are given a new lease of life in this stunning new two-in-one package. In Amazon Adventure, Hal and Roger Hunt take a pioneering expedition with their father into the uncharted waters of the Pastaza River, deep in the Amazonian jungle. They're looking for animals for their father's collection, but it seems someone doesn't want them to succeed and when their mother is threatened back home Hal and Roger are left to continue the mission alone...In Diving Adventure, Hal and Roger are in search of the marine wildlife that lives around Undersea City in the tropical waters of the Great Barrier Reef. They have some close encounters with sharks and killer whales but when the boys discover hidden gold in a sunken ship and their old enemy, Kaggs, appears, things start becoming even more dangerous...