Barry gets a new brother and has a mystery to solve in this sixth book in the Roald Dahl Funny Prize-winning series.  There's a new Loser in town, and Barry's not happy about it. The only thing that's keeping him going is a superkeel new drink from Feeko's Supermarket. But then disaster strikes, and Barry has to turn detective to solve the mystery of the century: the case of the crumpled carton!