The Hardy Boys Series

At their home in Bayport Frank, Joe, and Fenton, receive a visitor who informs them that Professor Morgan Todd from Kenworthy College has disappeared. At the time Fenton is working on security for a coastal radar station, which is under construction. The boys visit the college and are informed that the professor is away in Europe. However, the boys become suspicious, and their investigations lead them to Honeycomb Caves in Rockaway, where they uncover a plot to disrupt the operation of the radar station.

When a brilliant young professor mysteriously disappears, Frank and Joe Hardy find themselves thrown into one of their most thrilling cases yet. From the lively halls of Kenworthy College to the eerie depths of the Honeycomb Caves, the brothers follow a trail of cryptic clues that begins with a strange message scrawled on an exam paper. But nothing could prepare them for the dangers that lie ahead. As they explore the rugged caverns along the windswept coastline, the Hardy boys stumble upon a hidden searchlight whose powerful beam reveals a startling discovery.

While riding in their homemade iceboat on the frozen surface of Barmet Bay, Frank and Joe Hardy and Chet Morton discuss their plans for the upcoming Christmas holiday break. They visit Cabin Island but a mysterious stranger chases them off the island. The boys are invited to the home of Elroy Jefferson, a man whose car they returned in The Shore Road Mystery. They overhear an argument between Jefferson, the owner of Cabin Island, and Hanleigh, who is trying to buy the island. Mr. Jefferson rewards the boys and grants them permission to use the cabin for Christmas

Step into the frosty adventure of The Mystery of Cabin Island, where Frank and Joe Hardy, along with their loyal friend Chet Morton, embark on an unforgettable journey during their Christmas holiday break. It all begins with a thrilling ride across the frozen surface of Barmet Bay in their homemade iceboat, but their peaceful plans quickly take a mysterious turn. When the boys visit the remote and snow-covered Cabin Island, a strange encounter with a mysterious stranger leaves them shaken and determined to uncover the truth.

Frank and Joe are two teenage brothers who hope to follow in the footsteps of their father, a famous private detective. The Hardy Boys are joined by two friends, Chet and Biff, for a winter campout in a cabin on a remote island in Barmet Bay. But there seem to be others interested in the cabin, and a secret that it might hold. A sinister stranger orders them off the island, and when the boys don't comply, their food supplies are stolen.

Frank and Joe Hardy are excited to see the new mail planes landing near Bayport, until an out-of-control aircraft nearly crashes right on top of them! Their quick thinking saves their lives...but not the plane. And the angry airmail pilot, Giles Ducroy, blames the Hardy boys for his crash! Worse, the boys soon discover Ducroy has fallen in with two shady crooks, Ollie Jacobs and Newt Pipps, who are plotting something big. Their mysterious scheme might strike right at the heart of Bayport's booming airmail business.

Frank and Joe Hardy drive to see the new Bayport Airport. Before even getting there the boys are almost run over by an airplane flown by the airmail pilot Giles Ducroy. As a result of the event, Ducroy loses his job, blames the boys, and then frames them for a mail robbery. Although the boys don’t have an alibi they are bailed out of jail by Mr. Applegate (from The Tower Treasure) and Mr. Jefferson (from The Mystery of Cabin Island). The Hardy boys overhear Ducroy and two other criminals planning a major robbery.