I enjoyed this more than I expected to. The synopsis had me only mildly curious but once I got started, I was quickly intrigued. 
 I like the characters Penryn and Raffe. It takes awhile as they needed to grow on my, but with the first 1/3 of the book I was happy with them. The world building is both vague and complex depending what is being explained. I hope more will be revealed in the second book. I ended up leaving with more questions that I started with in the early chapters and I am not sure how that sits with me. There is some twisted stuff in this book. It goes beyond just a standard Angel vs Man concept. I really like the depth this is going. The last 60 pages or so gets a bit garbled at time. I don't like when an author paces a book one way, you settle into in and then more happens right at the end then the whole rest of the book combined. In this case, it was a bit of an info-overload that my mind needs a day to process (I literally just finish reading as I write this).