Hardy boys mystery stories

The Hardy boys investigate when someone tries to prevent a castle in southern France from being converted into a shelter for refugee children.

In trying to trace a missing will, detectives Frank and Joe Hardy trap a dangerous criminal who is willing to risk all--including murder--for money.

The Hardy boys' investigation of a museum robbery in England arouses the anger of a coven of black witches.

When Frank and Joe investigate threatening notes and a secret room in an old mansion, robbery and mistaken identity complicate matters.

When their SOS is ignored in a storm, the Hardy boys find a wallet containing two thousand dollars alongside their boat and are launched into a mystery involving diverse clues.

During their father's investigation of a ruthless gang of terrorists, the two young detectives face several adversaries.

The Hardy brothers interrupt their investigations of jewelry-store holdups to answer a plea from their cousin on a New Mexico cattle ranch.

When Frank and Joe Hardy investigate a hijacking, they become involved with industrial spies and a pursuit into the Canadian wilderness.

A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.

The Hardy boys travel to the Deep South to vindicate a long-dead Confederate general, disgraced during the Civil War because he was accused of stealing hidden gold belonging to a bank.