Between the Sea and the Sky by Jaclyn Dolamore. I'm not usually much for mermaid books, but the synopsis sounds like this could be a lovely book, and the cover is, of course, gorgeous.
The Wednesdays by Julie Borbeau. I love YA, of course, but I'm quite partial to MG as well, and especially books that "strike the perfect balance of creepiness and humor, with just a touch of old-fashioned charm" (from the synopsis). I'm so there.
The Book of Blood and Shadow by Robin Wasserman. I love murders and mysteries and creepy fantasy, so this book is right up my alley. In fact, my alley is named after this book. Well, not really, but you know what I mean.
Fracture by Megan Miranda. I'm so psyched to get a hold of this one! Altered brains and comas and death? Yes, please!
What did you get in your mailbox?