
I Don't Like Your Girlfriend by Claudia Gray. Cecily is going on her annual summer vacation with her mom's college witch friends. Kathleen is the daughter of one of her mom's friend who has made Celicy's life miserable and bring her perfect for Celicy boyfriend to the trip. Well Kathleen's really done it now and Celicy is going to prove it. So-so story.
The Law of Suspects by Maureen Johnson. Charlotte and Marylou go on vacation to France. A neighbor tells them a story about the Law of Suspects and then everybody goes murder crazy. Confusing story.
The Mirror House by Cassandra Clare. Evan and Violet tag along on their parents' honeymoon. Evan meets a gorgeous neighbor, you know the rest of the story, kind of. Satisfying ending.
Nowhere is Safe by Libba Bray. High school graduates go on a European vacation and fight the devil and his minions. This was the best story in the bunch. If this is a series, I'll read the ones that come next.