Stuart Gibbs

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.

Superspy middle schoolers Ben and Erica must embark on mission to rescue Erica's grandfather, who was abducted from a remote Alaskan training facility.

After getting expelled from spy school for accidentally shooting a live mortar into the principal's office, thirteen-year-old Ben finds himself recruited by evil crime organization SPYDER.

While visiting his girlfriend Summer in Malibu, Teddy stumbles upon two mysteries involving a blown up whale explosion and a string of beach sand thefts, but his investigation is sidetracked by a rumor that his girlfriend is dating a celebrity, leading him to question their relationship.

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.

For once, operations at the enormous zoo/theme park appear to be running smoothly (except for the occasional herring-related mishap in the penguin exhibit) and Teddy Fitzroy is finally able to give detective work a rest. But then a local lion is accused of killing a famous dog--and the dog's owner, an inflammatory radio host, goes on a crusade to have the cat declared a nuisance so it can be hunted. However, there's evidence that the lion might have...

In 2041 on Moon Base Alpha, thirteen-year-old Dash must solve the mystery of how Lars was poisoned before the base loses oxygen, forcing the colonists to return to Earth.--Provided by publisher.

While visiting a ranch near Yellowstone National Park with his parents, Summer, and her parents, Teddy Fitzroy investigates the disappearances of bison and an irreplaceable necklace.

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.