His Hardy boys mystery stories

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 search for a stolen boat leads the Hardy brothers to Mexico where they become involved with a band of Indians and a strange smuggling operation.

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

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

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

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