The robbery of the treasure in the tower proves to be an exciting challenge to Frank and Joe. Frank and Joe attempt to foil a ruthless espionage ring in their effort to sabotage the United States space program

When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out in a cave on an island along the way.

Frank and Joe bring their detective skills to the athletic arena in this all-new Hardy Boys Secret Files mystery!It's time for Field Day at Bayport Elementary and all the kids are excited! Whatever grade wins gets a pizza party, and the person with the highest personal score also gets a special prize. But when the field equipment is sabotaged the day before the events are supposed to start, it looks like Field Day might not happen after all--unless...

"It's lights, camera, disaster for a film crew unless Frank and Joe can track down a saboteur in this cinematic Hardy Boys adventure--a fresh approach to a classic series. Joe and Frank Hardy are excited to be cast as extras in the zombie movie that's filming in their hometown. Not only is film production way more exciting than what usually goes on in Bayport, it also doesn't hurt that the lead actress is pretty cute. At first it seems like for once...

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

"When the popular comics character Morpho the Morph Monster comes to Bayport for a fan event, everyone is excited, including Frank and his brother, Joe! Morpho is also bringing his very important Morph Spork--a special tool that helps him eat people's brains. But right before the event is about to start, Morpho's Spork goes missing!"--P. [4] of cover.