The second book in Cornelia Funke's bestselling series about a group of fun-loving girls who call themselves the C.H.I.X, and their adventures with rival boy gang, the Piranhas. Charlie, Hannah, Izzie and Xa are off to camp, but so is their rival boy gang. When a challenge is set, the girls find a secret spy - a new girl who's desperate to join the C.H.I.X. But the girls soon learn that being part of a gang isn't just about winning.