Franklin W Dixon

Frank and Joe Hardy look for clues after their friend's father is accused of stealing a treasure.

Teenage detectives Frank and Joe Hardy investigate a case of counterfeiting.

When the Hardy boys eagerly agree to assist their friend Jack Dodd and his father in locating a family treasure, the two young detectives are unaware of the baffling complications that will arise. The only clue to the long-lost treasure is a cryptic message written by a Pilgrim ancestor. But when Mr. Dodd and Jack are accused of stealing cars and then mysteriously disappear, Frank and Joe are confronted with a triple mystery. Have their friends run...

A cryptic note from their father leads the Hardy boys to the Caribbean where they must solve the mystery, but only if they can successfully evade the henchmen who are trailing them.

The Hardy Boys help their detective father search for a famous rocket scientist whose disappearance endangers the launching of the Firebird Rocket.

Frank and Joe travel to Philadelphia where they intend to prevent an attack on an extreme sports contest called the Big Air Games.

Frank and Joe are in London and learn that a new voice transmitter that can be implanted in a tooth has been stolen.

Frank and Joe have to find the master disk for a new computer game after its creator disappears.

The Hardy Boys travel to Cape Breton, where they investigate the mysterious disappearance of the creator of a maze.