Loved the worldbuilding, Lela is a great character, and the story is well-paced. I don't think I've read much else of this genre (is it paranormal romance? urban fantasy? there are so many fantasy subgenres these days, I can't keep up with them), so I don't know how it compares to others of its type, but I enjoyed it. 
 I had just a few nitpicks with it, the same sorts of things I always complain about when YA stuff gets too afterschool special-y. (view spoiler)[Also, did it have to be Auschwitz? It would have felt more authentic if she hadn't gone for the most famous concentration camp for Malachi's past, in my opinion. (hide spoiler)] I suspect lots of readers won't mind this, however, as it does make for some pretty high drama.