My only critique of this book, is that I really don't care for how Kara is a love who you are with kind of girl. Other than that, I love this book, and this series. I do not have any idea how to review this and not give away a major plot point, so all I can really say, is that the majority of this book takes place in the demon realm, and I think it moves the overall series story arc forward in a big way. That doesn't mean that I personally liked everything that happened, but I do get what it adds to the story. And it makes me want to reread the previous 4 books in the series, to see what I missed the first time.