This book was a fitting end to the trilogy. That said, it's not as good as the first two in the series. It takes a long time to get going, it spends quite a while ignoring the main characters from the first two books. And the end feels rushed, as if the author had had enough and just wanted to get it all over with. However, despite all that, it was still a good read.
A book provides information about Japanese traditions and features also mixing people with other worlds' creatures and spirits somehow lost a puff at the end. Good reading for funs of such genre.