Steel's Edge -  Ilona Andrews

The Edge series are well-writen, but I can always feel that something is missing. Something that would have made me love them as much as I love the Kate Daniels series. I really can't pinpoint it. It's is not the writing, because it is as good as can be expected from the writers, it is not the action, it's not the romance.. the books are amazing in every part.. but the sparks are missing.