From Wikipedia, the free encyclopedia Stuart Gibbs (born June 11, 1969) is an American author who has written mostly mystery and humor books that are aimed for tweens and teens. Gibbs' books have been described as "fun, fast-paced" and "entertaining." He has written six book series: the FunJungle series, the Moon Base Alpha series, the Spy School series, the Charlie Thorne series, the Last Musketeer and Once Upon a Tim. He also wrote a Batman comic called Bruce Wayne: Not Super. Gibbs wrote screenplays for Showdown (1993), See Spot Run (2001), and Repli-Kate (2002).