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.

Item # 44808907

Publisher: Grosset & Dunlap

ISBN: 9780448089072

Binding: Hardcover

Author: Dixon, Franklin W

Audience Type: Children

Published On: 05-01-1929

Pages: 192

Weight: 0.55 pounds

Dimensions: 7.62 x 5.04 x 0.70 inches