Franklin W. Dixon

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

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,...

Frank and Joe have volunteered to do undercover security work at the Bayport Winter Festival. They run into some masked, gun-wielding thugs who steal money intended for the local children's hospital.

When the Hardy boys reached the caves, they came unexpectedly upon a queer old hermit.

Two teenage sleuths help their detective father search for a famous rocket scientist whose disappearance endangers the launching of the Firebird Rocket. The launching of the Firebird Rocket is endangered when a famous rocket scientist disappears without a trace on his way to the Woomera Monitoring Station in Australia. Assigned to the case, Fenton Hardy tells his sons he needs their help. And Frank and Joe must turn down a request that they find...

The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.

When the daughter of Bayport's amusement park owner goes missing, Joe and Frank follow clues to find the girl and determine if her disappearance is related to that of another missing person.

A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.