Title: The Number File
Description: Hot water in the Bermuda Triangle

Frank and Joe are soaking up the sun in Bermuda and doing a little sleuthing on the side. Their father wants them to check out a shady character named Bernhard Kruger, the suspected kingpin of a big credit card scam. But the brothers aren't making any headway--so far Kruger is clean.

When the Hardys spy on Kruger's villa, one of his thugs spots them. Before they know it, they're being tailed by a black sedan and run off the road into the ocean! This is not the act of an innocent man. Their vacation shot, Frank and Joe resolve to nail Kruger. But he's on to them, and he has other plans--like arranging for the brothers to vanish in the Bermuda Triangle.
Subjects: Hardy Boys (Fictitious characters), Detective and mystery stories, Mystery fiction, Fiction, series:HardyBoys, collectionID:HBCFS, Children's fiction, Mystery and detective stories, Hardy boys (fictitious characters), fiction