When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out in a cave on an island along the way.

After a dying criminal confesses that his loot has been stashed "in the tower," the Hardy boys make an astonishing discovery.

Frank and Joe solve a dangerous mystery involving a payroll robbery, a mine cave-in, a piano playing ghost and bobby-trapped helicopter.

Action, mystery and cliff-hanging suspense abound in The Tower Treasure.

When Frank and Joe Hardy put a stop to the alarming, but mostly harmless, pranks of amateur moviemaker Seth Diller, a series of more dangerous copycat pranks leads them to a criminal group called the Red Arrow.

Detective brothers Frank and Joe work to solve a muddy mystery when the spring break Mud Bud Run is canceled due to a frog infestation.

While on a relaxing safari vacation to Nairobi, Frank and Joe Hardy become involved in finding the culprits responsible for killing innocent animals for their tusks and skins.

Frank and Joe have eight hours in which to locate a bomb designed to blow up Billington Resort.

Frank and Joe investigate sabotage on the set of a pirate-themed reality television show.

Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment Company's cargo planes, and Frank and Joe Hardy are called upon to assist their world-renowned detective father to solve the baffling case. At Stanwide the boys pose as employees, and become suspicious of their boss's hostility toward them. Is he involved in the racket? And what is the truth behind the plane crash at sea in which Clint Hill,...