Dixon, Franklin W

The robery of the treasure in the tower proves to be an exciting challenge to Frank and Joe.

Frank and Joe, the Hardy boys, solve a mystery involving a magician, American secret agents, and international spy ring, and a Scottish castle.

Frank and Joe investigate a walled estate guarded by savage dogs, where a businessman is hiding in fear of his life.

Once again Frank and Joe Hardy accept the challenge of a puzzling case when their famous detective father asks the boys to assist him in tracking down a notorious jewel thief and his accomplices.

Frank and Joe Hardy use their detective skills to uncover the mystery of the tower treasure!.

Joe and Frank Hardy use their detective skills to find the tower treasure!.

Rare collections of ancient pirate treasure are being stolen from a museum! Frank and Joe Hardy set out to find the culprit.