Rebel surfer-turned-field ops specialist Sydney finds herself in hot water while undercover on a marine research vessel, while her City Spies teammates investigate a suspected mole.

Laia is a Scholar living under the iron-fisted rule of the Martial Empire. When her brother is arrested for treason, Laia goes undercover as a slave at the empire's greatest military academy in exchange for assistance from rebel Scholars who claim that they will help to save her brother from execution. --Provided by publisher.

Rick Dial is faced with an impossible choice: save the life of his best friend Molly...or save the free world. Rick Dial’s career as a superstar quarterback ended when a car accident left him unable to walk. But his uncanny gaming ability caught the attention of a secret government organization trying to stop a high-tech terrorist attack on America. He’s been to the fantastical cyber world called the MindWar Realm...and returned to Real Life victorious....

Mike Fowler thinks the small desert town of Ambrosia is a dry, forsaken blip on the edge of civilization. He has no friends, no fun, and no answers to the agonizing disappearance of his dad in a top-secret military mission. But that could all change after Mike stumbles onto his dad's puzzling journal in the old B-17 out back. The mysterious entries in the journal lead him to a hidden canyon! Something big--maybe a covert military operation--is going...

At Desert Mountain Academy, sixteen-year-old Nadia Riley begins a punishing routine to become an undercover CIA agent, but when a double-agent is reported on campus, she is the top suspect.

Jyn Erso is tasked by the Rebel Alliance to find the plans to a new super weapon being developed by the Empire.

In June 1941, Otto and Leni, two young refugees from the Nazis living in England, are sent on a secret mission to Bavaria, to extract a young girl attending a summer camp, and who may hold the key to the war.

While on a mission aboard the The Emperor of the Seas, Ben Ripley faces off against his arch enemy, Murray Hill, on the high seas and quickly finds himself in hot water as things take a dangerous turn.

"When rare paintings go missing, the InvestiGators are called on the scene...the ART SCENE! Mango and Brash go undercover and under canvas as internationally renowned painters to expose a crook who has truly mastered the art of CRIME! Can they recover the missing masterpieces and save the city art museum's fundraising gala before it's too late...and they run out of appetizers? Find out in this latest pièce de résistance of action-packed illustrated...

My sister, Thea, is the mystery-loving rodent, not me! But somehow I found myself going undercover to get to the bottom of a case. Slimy Swiss balls -- I hardly knew where to start! Geronimo Stilton, Secret Agent Mouse? Maybe I could get used to that. ...