Twelve-year-old Theodore “Teddy” Roosevelt Fitzroy has murder on his hands and trouble on his tail. He believes that Henry, the hippopotamus at the brand-new FunJungle, has been murdered. The zoo’s top brass claim the hippo went belly up the natural way, but Teddy and his feisty friend...

“Combines Alex Rider’s espionage skills with a huge dose of the sarcasm of Artemis Fowl.” —School Library Journal Can an undercover nerd become a superstar agent? In the first book in the New York Times bestselling Spy School series, Ben Ripley sure hopes so—and his life may depend on...

The first book in the thrilling time travel adventure trilogy from New York Times bestselling Spy School author Stuart Gibbs—now with a brand-new look! Before they were legends, they were friends. All for one and one for all! On a family trip to Paris, Greg Rich's parents disappear. They're...

It’s a murder mystery on the moon in this humorous and suspenseful space adventure from the author of Belly Up and Spy School that The New York Times Book Review called “a delightful and brilliantly constructed middle grade thriller.” Like his fellow lunarnauts—otherwise known as...

Loyalty is tested in this second book in the thrilling time travel adventure trilogy from New York Times bestselling Spy School author Stuart Gibbs. Having assumed the identity of a young D’Artagnan, Greg Rich is beginning to get the hang of things in 1615 Paris. But he hasn’t figured out...