Author: Dixon Franklin W.. | Publisher: Grosset Dunlap| Pages: 180| Publication Date: 1992| Binding: Paperback| MSRP: 0.00| ISBN13: 9780448089072| ISBN: 0448089076| Other ISBN: 9781101076224| Other ISBN Binding: print| Language: en| Store Location: Chapter|"Book cover image may be different than what appears on the actual book."
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, Â 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.