Stuart Gibbs

In the tenth book in the New York Times bestselling Spy School series, Ben Ripley races against time and across state lines—by car, train, boat, and plane—to avoid his new cyber enemies and track down Murray Hill.
Ben Ripley's longtime nemesis, Murray Hill, has put a price on Ben's head and accused him of being at the center of a conspiracy on the internet. Now Ben finds himself in his greatest danger yet, on the...

Agent: Ben Ripley. Mission: Attend spy camp. Although it's not all fun and games. The evil organization SPYDER is up to no good again, and you're somehow connected to it. Objective: To find out what SPYDER is plotting, you'll have to team up on an adventure in the wilderness with Erica Hale, the best spy-in-training (who you have a major crush on)--and her father, Alexander Hale, who isn't quite as good a spy as he claims. Warning: You may have to...

In Paris with his parents to sell family heirlooms, fourteen-year-old Greg Rich suddenly finds himself four hundred years in the past, and is aided by boys who will one day be known as "The Three Musketeers."

"Decades ago, Albert Einstein devised an equation that could benefit all life on earth -- or destroy it. Fearing what would happen if the equation fell into the wrong hands, he hid it. But now a diabolical group known as the Furies is closing in on its location. In desperation, a team of CIA agents drags Charlie into the hunt, needing her brilliance to help them find it first -- even though this means placing her life in grave danger. In a breakneck...

Twelve-year-old Teddy Fitzroy is the prime suspect when FunJungle's newly-acquired koala goes missing, thanks to a prank staged by middle school bully Vance Jessup.

When Greg and the Musketeers return to Paris and find the city under siege, they leap into action to prevent King Louis from being overthrown and history from being changed forever.

Twelve-year-old Ben's unexpected success outside the classroom causes the CIA to activate him for a mission to become friends with Jessica Shang, daughter of a suspected Chinese crime boss.

The local police prove unhelpful when a 500-pound dinosaur skull vanishes from a secret excavation on Sage's family's ranch, so Teddy and his friends conduct their own investigation.

Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

With no knightly experience but plenty of pluck and an impressive vocabulary, a twelve-year-old peasant, hoping to improve his station in life, volunteers to help a cowardly prince and his not very powerful wizard rescue a princess from an evil, foul-smelling monster.