Frank and Joe are brothers, but that won't stop them from competing against each other at the Fun World arcade's video game tournament. The boys make a bet: Whoever wins the competition gets to move into the cool new room their dad just built! But suddenly money goes missing. The owner of Fun World shuts down the tournament until the stolen cash is returned! Can the boys figure out who took it? Or will their chances of victory -- and a brand-new room!...

Brothers Frank and Joe Hardy and their elementary school friends help them track down what they hope is a treasure after they find a mysterious map

"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

Feeling skeptical about a new kid's boasts about his magical talents, Frank and Joe Hardy wonder about a neighbor's prized show dog's recurring disappearances and reappearances, which seem to support the bragging newcomer's claims

Frank and Joe are excited to learn that Thrill Kingdom, their local amusement park, is having a contest for kids to design a brand-new ride. And they're even more excited that their friend Phil is entering. But on the day of the contest, someone ruins Phil's roller coaster contest entry. Since it had been kept in a locked room while awaiting final judging it's up to Frank and Joe to figure out the twists and turns of this coaster caper!

"Bayport Elementary's annual science fair is here, and Frank, Joe, and their friend Phil are determined to win. But the morning of the fair, Phil discovers that their awesome homemade robot has gone missing!"--P. 4 of cover

Joe and Frank Hardy win a contest to be handlers for a Green Crawler balloon in the annual fall festival, but when the balloon is sabotaged the day before the parade, the brothers must investigate

"It's finally summer vacation, and the Hardy family is headed on a cruise to the Caribbean. As they board the ship with their parents, Frank and Joe can't believe all the fun that's in store for them. There are three-story slides, playgrounds, ball pits, four pools, and an arcade. There are concerts and magic shows at night, while jugglers and clowns wander the deck during the day. In addition to all of the fun, the Hardys discover that former pop...

When television wildlife celebrities Jumpin' Jack and his son bring their menagerie to Bayport Elementary, Frank and Joe are on the case for a boa constrictor that goes missing

Frank and Joe vote to solve the mystery of who sabotaged their friend's election speech in this Hardy Boys Secret Files adventure