The cover Brandon Sanderson called 'really awesome.' Fellow Readers, 
It's nice now and then to read a book that takes religion seriously. I'm not much for religion personally, but it's the primary vehicle for a lot of our real-life character arcs, and I think it deserves more of a place in fiction. 
Doubly so YA, where such things usually get filed with parents and responsibility: out of the way of the protagonist who's got better things on their plate. Not so in  Defy the Stars , Claudia Gray's brilliant start to her Defy the Worlds series. Not only is her opening killer, her pacing intense and romance memorable, she manages to hit deep with a character who takes her religion seriously (even as she questions it). There's also a meditation on what it means to be human buried here, embodied in the form of an android main character, and she pulls it off flawlessly. Who says YA can't get deep? 
Well, a lot of people do, actually, and if you look at most of what's sold best in the genre, you'll understand why. But if you're looking for something meatier intellectually without sacrificing a fast-paced engaging story, you could do worse than to drop a couple dollars on Defy the Stars​. (I wrote a longer review for this on Top New Fantasy--find it here).