The House on the Cliff is a gripping mystery novel from the renowned Hardy Boys series, authored by Franklin W. Dixon. In this thrilling tale, brothers Frank and Joe Hardy, along with their best friend Chet Morton, find themselves drawn into a perplexing case that leads them to a secluded cliffside mansion with a dark and mysterious past. The story unfolds when the Hardy boys receive a cryptic message from their father, Fenton Hardy, a renowned detective,...

When the Hardys' wealthy neighbor is robbed, Joe and Frank are asked by their father to help solve the case.

On an ice-bound, snow-covered island, Frank and Joe attempt to solve the mystery of a boy's disappearance and the theft of a priceless collection of antique medals.

Valuable electronic parts containing platinum are being stolen from shipments made by Stanwide Mining Equipment’s cargo planes, and Frank and Joe are called upon to assist their world-renowned detective father solve the baffling case. While posing as Stanwide employees, the boys look into the truth behind the chief pilot’s death at sea. The puzzling trail of clues leads the young sleuths to an uninhabited Caribbean island, but the final,...

Frank and Joe race against time to retrieve a scientist’s top-secret invention before thieves get their hands on it. But the young detectives soon discover that they are involved in a mystery far greater in scope than just safeguarding the invention. When Joe is kidnapped, this incident starts Frank of on a chase that could end disastrously for him and his pals.

Their friend Biff Hooper's disappearance at a survival game camp in Georgia leads the Hardy boys to discover a training site for an elite corps of attack troops.

The Hardy boys stumble across a twisted technological plot creating perfect replicas of human beings, and fight for the survival of a top secret government intelligence organization.

Beautiful, rich, and spoiled Tessa invites Frank and Joe to look at her priceless treasure, the Borgia dagger. Fearing the curse on the dagger, Tessa asks the brother detectives to protect her.

Nancy and the Hardy Boys conduct a manhunt for a pair of cat burglars they believe are after the crown jewels of Sarconne.