Stuart Gibbs is an American middle-grade author best known for fast, funny mystery and adventure series such as Spy School, FunJungle, Charlie Thorne, Moon Base Alpha, and Once Upon a Tim. A former screenwriter, television... developer, newspaper columnist, and animal researcher, Gibbs brings a strong sense of pace, humor, and factual curiosity to books built around clear hooks and clever young protagonists. His stories move from comic espionage and zoo mysteries to lunar investigations, historical adventure, and fantasy, but they share the same appeal: short chapters, puzzle-driven plots, lively dialogue, and kids who think their way through danger. Readers return to Gibbs for accessible suspense, smart humor, and series worlds that make information feel entertaining.