Hoping to win the pizza party grand prize on Field Day at Bayport Elementary, Frank and Joe Hardy investigate clues to discover who has sabotaged the events by ruining rackets, tangling jump ropes, and flattening balloons.

Right before the final game of the Little League season, the Bayport Bandits' lucky charm--Jason's mitt--goes missing! The team is devastated. Can Frank and Joe solve the case of the missing mitt before the Bandits lose the game?

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 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!...

"Teen detectives Frank and Joe Hardy have investigated many crimes in their lives, but nothing that hits this close to home. Their best friend died mysteriously after taking down a major crime organization. They must put together the clues to uncover the truth about this shocking crime, but the clues lead them to a stunningly unexpected direction!"--Back cover.

When a ferocious, wolf-like creature appears in a small town, the Hardy boys are hired to clear the name of a young man who has a history of werewolves in his family.