Only the Good Spy Young (Gallagher Girls #4)

I thought I was prepared for most scary situations. I've been almost kidnapped twice, fake kidnapped once, targeted by one terrorist organization and two very cute boys. But this moment was truly terrifying...Cammie 'The Chameleon' knows by now that even she can't hide from danger. But when she discovers that one of her most-trusted allies is a rogue double-agent, Cammie questions her trust in her classmates, her teachers - and her own heart...