Fenton Hardy, the famous private detective and father of the Hardy Boys, asks his sons to help him with his latest case involving the illegal drug trade. Hardy sends Frank and Joe to a house on the cliff, whose location offers an excellent vantage point to watch for smugglers. The Hardy Boys are tricked into going inside the house by cries for help and find themselves trapped for a short time in the attic, meanwhile, their telescope and motorcycles...

"The Secret of the Old Mill" is the third installment in the "Hardy Boys" series of mystery stories. Written by Canadian author Charles Leslie McFarlane and published under the pen name, Franklin W. Dixon, in 1927, "The Secret of the Old Mill" ranks as one of the best books in the series. In this thrilling installment, readers find the Hardy brothers, Joe and Frank, investigating the mysterious appearance of counterfeit money in their small town of...

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

A series of bizarre events in their home town lead the Hardy Boys on a trail of robbers and kidnappers.

Frank and Joe, the Hardy boys, solve a mystery involving a magician, American secret agents, and international spy ring, and a Scottish castle.

Their SOS 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.

Their efforts to recover a stolen ancient chess piece lead the Hardy Boys to Hong Kong where they help smash an international criminal organization.

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