Mortimer Keene is full to bursting with madcap plans, and if it's trouble you're after, look no further! With laugh-out-loud illustrations, rollicking rhymes, and short chapters perfect for new readers. Mortimer Keene has made a robot! Several, in fact. And they're all being helpful around the school. Until Robo-13 goes haywire and hacks into the Robot Control system. Soon the robots are causing complete chaos! Can Mortimer regain control over his monstrous machines?