hardy boys (fictional characters)

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.

Joe and Frank Hardy investigate the plot to destroy Niagara Falls and must locate the culprit before any damage can be done.

Frank and Joe investigate a woman's death and other mysterious events surrounding Uncle Bernie's Fun Park.

Frank and Joe Hardy are undercover agents for the American Teens Against Crime organization and are assigned to investigate the sabotaging of an extreme sports meet in Philadelphia.

Joe and Frank Hardy, undercover agents for ATAC--American Teens Against Crime--travel to Ocean Grove, New Jersey, on an assignment to figure out who is responsible for a rash of jewelry store robberies in the tourist town.

Frank and Joe suspect that Nick Rodriguez is being framed for a crime against his former girlfriend who is a soap opera star.

Frank and Joe travel to Massachusetts where they investigate a death and other mysterious events occurring at an amusement park.

Frank and Joe travel to California where they investigate a utopian community to see if they intend to sabotage the oil industry.

Frank and Joe try to stop someone from destroying Niagara Falls.

Frank and Joe try to stop the illegal international CD-burning operation that employs teenagers.