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Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment�s cargo planes, and Frank and Joe are called upon to assist their world-renowned detective father solve the baffling case. While posing as Stanwide employees, the boys look into the truth behind the chief pilot�s death at sea. The puzzling trail of clues leads the young sleuths to an uninhabited Caribbean island, but the final, and most startling, discovery is made in the boys� home town of Bayport. From the Hardcover edition.