Roy Rockwood 
Under the Ocean to the South Pole [EPUB ebook] 

Roy Rockwood was a house pseudonym used by the Stratemeyer Syndicate for boy's adventure books. The name is mostly well-remembered for the Bomba, the Jungle Boy (1926-1937) and Great Marvel series (1906- 1935). The Stratemeyer Syndicate was the producer of a number of series for children and adults including the Nancy Drew mysteries, the Hardy Boys, and others. The Stratemeyer Syndicate was the creation of Edward Stratemeyer, whose ambition was to be a writer la Horatio Alger.