cross my heart and hope to spy

Cross my Heart and Hope to Spy by Ally Carter is the sequel to the equally fun and funny "I'd Tell you I Love You, But Then I'd Have to Kill You". In both stories, Cammie is a typical teenager girl, except that her mom is the headmistress at a school for girl spies and Cammie is a student there. Highly recommended, especially on audiobook.
I listened to it, 7 hours.