Frank and Joe Hardy finish up a case helping a fellow A.T.A.C. (American Teens Against Crime) agent, who sharp-eyed fans may recognize despite her Alias. Things seem to quiet down when A.T.A.C. sends Frank and Joe undercover to investigate a new Mall opening in Bayport, due to several suspicious accidents there. But things get exciting when the night before the big opening, Joe, Frank, and seven others are mysteriously locked in the mall--with a murderer...

When a mysterious saboteur infiltrates the Miss Teen Stunt Americana competition, Joe and Frank are assigned to back up one of the contestants... Lind'Z Rider, the most flamboyant and impulsive A.T.A.C. agent ever! As if the competition stunts weren't dangerous enough, Frank and Joe must stop the saboteur before someone dies!. --Provided by publisher.

The brothers Frank and Joe Hardy go undercover at a major skateboarding contest in Venice, California to find out which competitor is trying to kill off the competition--literally? The list of suspects includes Dex Thom, a skilled skateboarder whose parents wanted him to be a musical prodigy, the Pink Shadow, a girl of mystery, and her equally secretive trainer Mr. Miyagi and the Wraith, a dark and brooding young man. Will Frank and Joe solve the...

When several teens from a "tough love" western camp turn up missing, Frank and Joe Hardy go undercover on the open range! But what happens when the undercover brothers are surrounded by kids that like being bad with corrupt administrators that intend to keep them that way?. --Provided by publisher.

Frank and Joe go undercover at a national spelling bee where a mysterious madman known as the Hangman is determined to erase the competition! Teens from across the globe have been invited to attend, and A.T.A.C. and the Hardy Boys have to do everything they can to keep the Hangman from spelling disaster!. --Provided by publisher.

While attending an amusement park under the new ownership of their friend Daisy, Joe and Frank investigate the disappearance of a patron who was last seen riding a hit attraction, an event that has threatened Daisy's family's livelihood.

At a nationwide drama competition, Frank and Joe Hardy must go undercover to discover which contestant has been knocking off the competition by any means possible--including deadly force! While Joe keeps an eye on all of the backstage intrigue, Frank, posing as a competing drama student, may be distracted from his mission by the romantic attentions of a beautiful acting student named Erin. Things get further complicated when Erin becomes the only...

When some of the world's most amazing magicians start disappearing--and not in a magical way--Frank and Joe Hardy pit themselves against a trio of powerful young masters of illusion! Written by Scott Lobdell and illustrated by Paulo Henrique. --Provided by publisher.

The evil female counterparts of the Hardy Boys, the Sisters Noir and their equally evil father return to create serious chaos! Joe and Frank are working out at a top-secret training facility on the grounds of A.T.A.C. headquarters when the compound is set-upon by Poppa Noir's anti-justice organization. The only two people who are available to free the captured adult A.T.A.C. agents are the Hardy Boys, and they have their hands filled battling their...

When A.T.A.C. (American Teens Against Crime) agents across the country are all suddenly pulled into strange and bizarre cases, it's up to special operatives Joe and Frank Hardy to find out exactly what is going on! But this won't be easy--whoever is behind these seemingly unrelated cases is throwing A.T.A.C. into chaos. And just to complicate matters further, it appears everyone Joe and Frank, the Undercover Brothers, have encountered in the past...