Cross My Heart and Hope to Spy — Ally Carter

AFTER STAKING OUT, obtaining, and then being forced to give up her first boyfriend, Josh, all Cammie Morgan wants is a peaceful semester. But that's easier said than done when you're a CIA legacy and go to the Gallagher Academy, the premier school in the world . . . for spies.

Despite Cammie's best intentions to be a normal student, danger seems to follow her. She and her friends learn that their school is going to play host to some mysterious guests -- code name: Blackthorne. Then she's blamed for a security breach that leaves the school's top secret status at risk.

Soon Cammie and her friends are crawling through walls and surveilling the school to learn the truth about Blackthorne and clear Cammie's name. Even though they have confidence in their spy skills, this time the targets are tougher (and hotter), and the stakes for Cammie's heart -- and her beloved school -- are higher than ever.