Henry Carter Hull

Frank and Joe face danger on a tropical island in the Caribbean where they were led by a note hidden in a ventriloquist's dummy.

When a ship supposedly carrying a gold Pharaoh's head sinks, Joe and Frank help their father discover whether the owner is trying to defraud the insurance company and along the way encounter a ghostly apparition and a scuba diver with a grudge.

The Hardy boys and their father solve a mystery involving inexplicable crashes of highspeed race cars being used to test an experimental turbine motor.

The Hardy boys embark on another puzzling mystery when they try to discover who is stealing rare collections of ancient pirate treasure and smuggling them out of the United States.

On a trip to a Rocky Mountain resort, Frank and Joe see a strange green light in the sky followed by the disappearance of three people including Joe.

Falsely accused of a robbery at the airport, the Hardy boys turn the tables on the real thieves by nabbing them in the act of committing another robbery.

A series of adventures begin for the Hardy boys after they sail their-ice boat to the desolate and inhospitable Cabin Island.

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