The Hardy Boys

The Hardy Boys

The Secret of the Caves

Book - 1929
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Penguin Putnam
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, a new clue is unearthed that sends the young detectives to the Honeycomb Caves. After many dangerous encounters,  Frank and Joe discover a powerful searchlight in one of the craggy caverns along the seacoast. In the brilliant white glare of the searchlight, the startling secret of the caves is dramatically revealed.

Baker & Taylor
The Hardys and their friends discover the key to a spy ring while exploring a local cave

Publisher: Grosset and Dunlap, 1929
ISBN: 9780448089072
Characteristics: p. ; cm


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