The Hardy boys intercept a coded message that points to plenty of big trouble under the big top.

When thirteen-year-old Logan and his family move into a run-down old house in rural Virginia, he discovers that a woman was murdered there and becomes involved with his neighbor Arthur in a dangerous investigation to try to uncover the killer.

Frank and Joe investigate the legend of Whalebone Island when they receive a warning concerning a sunken freighter.

Caught in their motorboat the Sleuth by a sudden storm at sea, Frank and Joe Hardy are helpless when the engine conks out. Drifting farther from shore amid the tumultuous waves, the boys are relieved to see the lights of a yacht. But their SOS is ignored. The shrill sound of a siren fills the night air. Moments later, a helicopter drops an object alongside the Sleuth. To the young detectives' astonishment it proves to be a wallet containing two thousand...

While helping their father on an investigation at a science fiction theme park, Frank and Joe Hardy are horrified when their father is kidnapped, and soon they are drawn into the fight of their lives.

The Hardy Boys go to Maine to help their father's friend find out why his lonely hunting lodge is plagued by a series of strange accidents.

Frank and Joe Hardy end up on a crazed locomotive ride when they investigate the strange disappearance of an Indiana millionaire's priceless model train set-up.

The Hardys' summer construction job on a skyscraper is threatened by thugs who would threaten the multi-million-dollar skyscraper project as well as untold lives. Original.