Age Group: 9 - 12 Years

Description:

Summer in Bayport takes a sinister turn when Frank and Joe Hardy's best pals, Chet Morton and Biff Hooper, vanish without a trace shortly after a lively costume party. Just hours earlier, the brothers had witnessed a daring bank robbery — and with Chet dressed in the same outfit as Joe that evening, the disappearance smells of mistaken identity. Determined to bring their chums home, the teen sleuths set sail on their boat the Sleuth, chasing leads across Barmet Bay's hidden islands, through rough neighbourhoods, and into the path of a ruthless gang. Boat chases, narrow escapes, coded clues, and quick thinking carry the investigation forward at breakneck speed. Fourth in the classic Hardy Boys series, this gripping adventure blends loyalty, courage, and old-fashioned detective work into one unforgettable case.