Dixon, Franklin W. author New York Grosset & Dunlap 1992 eng 180 p. ill. 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. [Fic] 9780448089072 000031/00003150.jpg 000031/00003150.jpg BR-BrIDEA 118594