Ally Carter Duo Novels both First Editions New

Don't judge a girl by her cover, & Cross my heart and hope to spy. both books Cammie Morgan and her adventures, one involves Cammie in school to be a spy, she and her friends realize someone mysterious is visiting their school soon, when word gets out Cammie is blamed for the breach, can she and her friends learn what's really going on and at the same time, clear Cammie's name?