Title: Dead in the Water
Description: The Hardys vow to rescue Alvin Mann but first they have to confront a brutal adversary armed with knives, spearguns, and more.
Subjects: Hardy Boys (Fictitious characters), Juvenile fiction, Submarines (Ships), Skin diving, Fiction, series:HardyBoys, collectionID:HBCFS, Mystery and detective stories, Children's fiction, Hardy boys (fictitious characters), fiction
Places: Florida