I mostly enjoyed this book.
The Agent thing reminded me of the show Reaper. The Christian mythology isn't new either, but that's okay.
I liked the characters but I think I'm going to get tired of the court and Maddy not knowing the rules. It's pretty archaic and I don't see how she can carve out an existence for herself. It would be nice to see some female angels so it wouldn't hit the patriarchy note so hard.