genre underwater adventure
Amazon ___MASK10___ is a 1949 children ' s ___MASK85___ by the Canadian - born American author Willard Price featuring his " ___MASK10___ " series characters , Hal and Roger Hunt . It depicts an expedition to the Amazon River to capture animals for their father ' s wildlife collection business . Hal and Roger Hunt are fictional characters appearing in the children ' s " ___MASK10___ " ___MASK85___ series , by Canadian - born American author Willard Price . The sons of world - renowned animal collector John Hunt , Hal and Roger have grown up alongside exotic and dangerous wildlife . In " Amazon ___MASK10___ ", the boys ' literary debut , Hal is 19 years old and Roger is 13 years old . Underwater ___MASK10___ is a 1954 children ' s book by the Canadian - born American author Willard Price featuring his `` ___MASK10___ '' series characters , Hal and Roger Hunt . The book is about how they go diving and snorkelling for the Oceanographic institute , with a braggish and self - centered man , Skink , on their exciting journey .