|The Number File|
|House name||Franklin W. Dixon|
|Cover artist||Brian Kotzky|
|Publication date||July 1988|
|Media type||Print (paperback)|
|Series||The Hardy Boys Casefiles|
|Preceded by||Line of Fire|
|Followed by||A Killing in the Market|
- "Counting On Crime Is A Risky Business."
- — Tag-line, from front cover
The Number File is the 17th book in The Hardy Boys Casefiles series. It was first published by Archway Paperbacks (an imprint of Simon & Schuster) in July 1988.
End of Casefile#16 -- It's supposed to be a carefree Bermuda vacation for the Hardy brothers with just a little bit of detective work on the side. Between sunbathing and snorkeling they'll investigate local expatriate Bernhard Kruger, who may be involved in a credit card scam. Things heat up fast. First Frank and Joe's car is run off a cliff into the water. Then, when they try to rent a couple of mopeds with their father's credit card, they're charged with fraud and counterfeiting. With a vicious enemy closing in, Frank and Joe find themselves in some very deep water.
Back Cover Write-Up -- Frank and Joe are soaking up some 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 had other plans---like arranging for the brothers to vanish in the Bermuda Triangle.
- Frank Hardy
- Joe Hardy
- Fenton Hardy
- Alfred Montague
- Alicia Montague
- Bernhard Kruger/Mr.Weisberg
- Bill Baylis
- Walt Conway
- Chief Boulton
- Martin Powers (mention only)
- Coast Guard Captain George Hodges
- Ezra Collig (mentioned only)
- Chet Morton (mentioned only)
- Biff Hooper (mentioned only)
- Phil Cohen (mentioned only)
Businesses and organizations
- First Hardy Boys adventure to deal with computer identity theft.