Angel Evolution: Book One by David Estes

I received this book via early reviewer from LibraryThing. I have to say that I really enjoyed this book.  I thought it was rather short and the characters could have been fleshed out a little more but the story line itself was great. I liked the back and forth between angels and demons. It is a nice change from the vampires and werewolves genre that seems to have taken over fiction. I do feel like that book ended abruptly though.  I am definitely looking forward to the second and third books in this series.