Gallagher Girls: Don't Judge a Girl by Her Cover - Ally Carter

The third book in the million copy selling Gallagher Girls series set at an elite boarding school for spies. Perfect for fans of XO, Kitty.Here's the thing about covert operations: they never, ever let you stop to put on comfortable shoes.A spy-in-training at Gallagher Academy, Cammie Morgan has a cover for every occasion. But when she's forced to blow hers to save her best friend from being kidnapped, Cammie and her friends are determined to hunt down the sinister organisation threatening to tear their secret sisterhood apart. Because this time it's personal.