The fourth and final (?) book in this series. In this book we meet Elizabeth Cely Saintjohn an asrai, a rare type of water fae. She is young, conflicted but determined. The Summer Queen has given Elizabeth two parts of the key needed to open the book that can free the fae from the prison that is Piefferburg. Neither want the walls to come down although for very different reasons. Enter Niall Quinn. He has been sent by the Shadow Queen to retrieve the keys.
I think this may have been the best book in the series. All of the characters are wonderfully multifaceted. A definite must read for Anya Bast fans.