Willard Price's Adventure series

The "Adventure" series is a collection of children's adventure novels by Canadian-born American author Willard Price. The fourteen-book series chronicles the exploits of budding teenage zoologists Hal and Roger Hunt, as they travel around the world capturing exotic and dangerous animals for their father's wildlife collection.

Shortly before his death, in 1983, Price commented that:

My aim in writing the Adventure series for young people was to lead them to read by making reading exciting and full of adventure. At the same time I want to inspire an interest in wild animals and their behavior. Judging from the letters I have received from boys and girls around the world, I believe I have helped open to them the worlds of books and natural history.

Hal and Roger Hunt

The sons of respected animal collector John Hunt, Hal and Roger have taken a year off school to help capture animals for their father's collection on Long Island, after which the captive specimens are sold to zoos, circuses and nature parks. In Amazon Adventure, the boys' literary debut, Hal is eighteen years old and Roger is thirteen years old.

Hal is the typical hero: tall, handsome, and muscular, possessing an almost limitless knowledge of natural history and a caring and trusting disposition. Roger, on the other hand, is an ardent practical-joker, often mischievous but just as resilient and resourceful as his older brother.

Each novel in the Adventure series is notable for its memorable selection of loathsome villains and enemies. Some of these, through their interactions with Hal and Roger, are led to redeem their past misdeeds, while others simply suffer the consequences of their actions. Only one enemy, the cunning "Reverend" Merlin Kaggs, appears as a villain in more than one book.

In October 2006, the Price family of Holden, Massachusetts entered into an agreement to sell the copyrights and related legal rights for the fourteen Adventure series titles, plus the right to use Price's name, to London-based literary brand owner and investor Fleming Literary Management for an undisclosed six-figure sum.

In July 2011, it was announced that English author Anthony McGowan had been contracted by Puffin Books to write four new books based on Willard Price's classic wildlife adventures series.

...
Wikipedia