Aztec vampire aristocrat is on the run from nouveau riche vampire dudebro, teams up with homeless teen in Mexico City. Oh, and she also has a deadly, modified doberman as her sidekick.

I'm a sucker for original world-building, and while this book doesn't read like your typical YA-fare (it's more like a mix of horror/crime novel with a bit of YA romance thrown in) I found it to be a fast, compulsive read that had me wishing it wasn't a stand-alone book.