panda
The secret of the caves
Spies, fiction
Hardy boys (fictitious characters), fiction
series:HardyBoys
Spies
Missing persons, fiction
Mystery
Mystery and detective stories
Detective and mystery stories
Children's fiction
Juvenile fiction
Juvenile literature
Fiction
Triggered by the disappearance of a brilliant young professor, this mystery takes the Hardy boys first to Kenworthy College, where they find a puzzling message on an examination paper. But then their pal Chet Morton, with his new metal detector, and buddy Biff Hooper, turn up a clue that sends the y…
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