A fun read, I devoured it in one sitting. Not sure I'm super keen on the ending though.
It's really good if you don't think about it too hard. But Addie and Henry didn't really have anything in common other than the fact that there was literally no one else they could be in relationships with. But Addie is happy to give that away (and Henry seems fine with it also) and seems fine with being with the devil for the next however many years. I dunno, it feels like it shouldn't have been a happy ending.