Hector is being hectored by an unlikely bully: a talking brain tumor. And it's not just a talking brain tumor. It's a know-it-all, pain-in-the-arse, jibber-jabbering brain tumor that names itself Jack, and insists on coaching Hector through life even as it's threatening to take his life away. It's a pretty good coach, actually. With Jack in control of Hector's speech and brain chemicals, Hector suddenly finds himself with a cool haircut, a new fashion sense, and tactics for snogging previously unattainable hottie Uma Upshaw. But when Jack begins to force increasingly questionable decisions and behavior, Hector has to find a way to turn the tables - before it's too late for both of them.

Delightfully twisted, desperately funny, and deeply moving, this novel is also the winner of the Booktrust Teenage Prize in the United Kingdom.