Frank and Joe Hardy have been sent on a mission to live on the edge! A new theme park, Galaxy X, is about to open. But someone out there obviously wants Galaxy X to go away. The park owner has received threatening e-mails, and accidents are becoming frequent. In Galaxy X, the brothers have to find the saboteur before opening day, or someone could get seriously hurt. In X-plosion, Frank and Joe must trail pro skater Cody Zane, brought to Galaxy X for the grand opening, and find out who would want to end his career just as it’s about to explode. . . .

Frank and Joe Hardy have been sent on a mission to live on the edge! A new theme park, Galaxy X, is about to open. But someone out there obviously wants Galaxy X to go away. The park owner has received threatening e-mails, and accidents are becoming frequent. In Galaxy X, the brothers have to find the saboteur before opening day, or someone could get seriously hurt. In X-plosion, Frank and Joe must trail pro skater Cody Zane, brought to Galaxy X for the grand opening, and find out who would want to end his career just as it’s about to explode. . . .

With only the slender clue of an arrow-shaped tie clasp, Frank and Joe Hardy pick up the trail of a cunning gang of thieves responsible for a wave of jewelry-store holdups. But their investigations are interrupted when a desperate plea for help comes from their widowed cousin who lives on a cattle ranch in New Mexico. Frank, Joe, and their pal Chet fly there immediately, and manage to put an end to the trouble at the ranch and solve the jewelry-store robberies.

The Hardy Boys follow their old enemy Charity to a crooks' convention in San Diego.

A mission for ATAC has Frank and Joe Hardy traveling the world. The teenage son of a prominent mid-eastern diplomat has gone missing on the Caribbean island of St. John, and the boys take off to find him. Turns out he's been kidnapped by a group involved in a scheme to rob a sunken Spanish galleon of its treasures and sell them on the black market. Frank and Joe search high and low--fighting thugs and sharks--for clues. When the Hardys finally find their quarry, there's another problem --he turns out to be the mastermind of the ring, not its victim!

It's a holiday investigation for Frank and Joe Hardy! Frank and Joe go undercover at a New York City home for teenage runnaways during the annual Thanksgiving meal, after one of the home's former residents is pushed off a subway platform.