Stuart Gibbs Books
Stuart Gibbs is an American author known for his humorous and adventurous middle-grade novels, including the Spy School, FunJungle, and Moon Base Alpha series. Before becoming a full-time writer, he worked in screenwriting and television, experiences that influence his fast-paced storytelling style.
Known for: Belly Up, Spy School
Books by Stuart Gibbs

Belly Up
When Henry the Hippo, the star attraction at FunJungle, dies under suspicious circumstances, twelve-year-old Teddy Fitzroy sets out to uncover the truth. As he investigates, he discovers that the zoo’...

Spy School
Ben Ripley, a middle school student with dreams of becoming a CIA agent, is unexpectedly recruited into a junior academy for spies. As he navigates the challenges of espionage training, he discovers t...
Key Insights from Stuart Gibbs
Uncovering the First Clues: Teddy’s Suspicion
It all begins with small, ordinary details — the kind of things that adults dismiss but Teddy Fitzroy notices. Henry the Hippo dies, and FunJungle officials say it’s because of natural causes. But Teddy has a sharp mind and a strong instinct. Having grown up among animals and zoo staff, he understan...
From Belly Up
Inside FunJungle: Friendship and Secrets
FunJungle is not just a zoo; it’s a microcosm of human ambition. Behind every exhibit and flashy advertisement lies a network of managers, scientists, and investors entangled in self-interests. To make Teddy’s path even more complex, there’s Summer McCracken — the daughter of the park’s billionaire ...
From Belly Up
Ben’s Unexpected Recruitment and Arrival
It all begins with an invitation that makes no sense. Ben Ripley is a math-savvy but socially clumsy kid, whose conversations usually end in awkward silence. His greatest ambition is to one day join the CIA — even though his skills extend mostly to acing algebra tests and watching spy shows. When an...
From Spy School
Mentorship and Mystery: Learning from Erica Hale
When Erica Hale enters the story, the pace shifts. Erica is brilliant, confident, and every bit the spy Ben wishes he could be. Coming from a family known for legendary CIA service, she is disciplined to the core, fluent in strategy, and nearly impossible to impress. At first, Ben idolizes her, but ...
From Spy School
About Stuart Gibbs
Stuart Gibbs is an American author known for his humorous and adventurous middle-grade novels, including the Spy School, FunJungle, and Moon Base Alpha series. Before becoming a full-time writer, he worked in screenwriting and television, experiences that influence his fast-paced storytelling style.
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Stuart Gibbs is an American author known for his humorous and adventurous middle-grade novels, including the Spy School, FunJungle, and Moon Base Alpha series. Before becoming a full-time writer, he worked in screenwriting and television, experiences that influence his fast-paced storytelling style.
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