Gallagher Girls : Cross my Heart and Hope to Spy by Ally Carter

Danger. Glamour. Fun. Everything a girl needs.
 
I risked the most sacred sisterhood in the history of espionage, for a boy.
 
As a spy-in-training, Cammie Morgan is used to danger. But this time the Academy itself is in trouble - and Cammie is getting the blame. 
 
Suitable for ages 12-Teen