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Frank and Joe solve a mystery involving a missing man, an abandoned airplane and giants in the desert.

The Hardy boys and two friends take a camping trip to the Rocky Mountains in an attempt to locate a gang of credit-card counterfeiters.

While searching in Iceland for a missing sailor sought by an insurance company, the teen-age detective brothers uncover a plot threatening the life of a United States astronaut and the secrets of NASA's moon project.

Frank and Joe Hardy, selected to be among the first contestants on a reality-based game show filming in Bayport, find themselves on the defensive when their success at the game leads jealous competitors to blame them for problems on the set.

A disappearing floor, a savage-looking hound, a galloping ghost and a startling invention are just a few of the strange elements that complicate Frank and Joe's efforts to solve the mystery of the death of an heir to a mansion.

A stolen cartridge leads the Hardy Boys to suspect a video game contest has been rigged.

After Frank, Joe, and their friend Biff visit a baseball convention in New York City where they are sold a counterfeit card, they discover a scam and find themselves playing hardball.

When Mr. Hardy disappears while investigating a mystery surrounding a vacant house rumored to be either haunted or an abode for criminals, the Hardy Boys search for the truth.

The Hardy brothers' search for the missing son of a wealthy industrialist leads them to Brazil and great danger.

The Hardy brothers' visiting Greek pen pal enlists their help in searching for a priceless ancient Greek helmet loaned to and lost by a Hollywood movie company years before.

The Hardy boys, in Paris as part of the crew for a soccer match, put their lives in danger when they set out to investigate a series of crimes that has placed the soccer stadium, and most of the city, under siege.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

Hired to locate an old Spanish cannon, the Hardy brothers uncover an even greater treasure after perilous underwater adventures.

The Hardy boys investigate when the set of the television show "Warp Space" is sabotaged.

Frank and Joe's investigation into the disappearance of their friend Phil Cohen, an electronics whiz, leads them to a top-secret plot that threatens the security of the entire world.