This is another great addition to the Night Huntress series. This book picks up right where This Side of the Grave left off. There were a few times that I wasn't sure how Jeaniene Frost was going to fit all the information into the book based on how it's set up. There are a few storylines set up here that will be dealt with either in the next book or over the course of a couple books. 
 This storyline mainly deals with the ghost of sixteenth century "witch" killer Henry Kramer who is now a ghost that can become solid flesh and bone every Halloween. He takes the opportunity to continue hunting and killing women who he believes are withces. 
 I really thought that this was a solid storyline to follow. Kramer is based on the true Henry Kramer that lived and indeed killed women for witchcraft. I don't know anything about the true history of Henry Kramer, and Jeaniene Frost even states in her acknowledgements that she did indeed take creative license. Nevertheless, I still find the story itself an interesting one. 
 I almost felt like this book breathed a little more life into the series. Not that it has been lacking, mind you, but we had the first four books of very intense action and emotions. Cat and Bones dealt with and went through a lot in the first four books. The fifth book, while a lot did happen, felt more like Cat and Bones get a slight breather before tackling the big threat that Frost comes up with in this book. 
 Like I said she definitely set up some storylines for future books. We get to see who is taking over Don's operation now that he's dead, and they do not care at all for Cat. I'm very interested to see where this is taken and to what extent these new people will go to keep Cat out of their business. Frost would put these scenes in intermittantly throughout that book to remind us that something else was still lurking in the background. Whenever these scenes would come up part of me would wish that we would get more information, but alas I think that's Frost's draw to keep us wondering what will happen next. I can't wait to find out. 
 One of the major things that I love about this series is, of course, the relationship between Cat and Bones. I like that Frost has had these two together since the beginning. Even though they've been through a lot, they've always been a solid centerpoint for the series. I don't know what I would do if it were otherwise. It's refreshing to see a couple together in books these days. Too often writers focus on creating the tension between the characters only having them finally get togheter when the book / series has ended. Therefore, we don't get to see any development. Here, we continually get to see the relationship that Cat and Bones have grow and change. I love that you can see the devotion each one has for the other. That will never change. 
 I don't know when another full-length Night Huntress novel will be out. We will be getting a short story in a Christmas anthology releasing in November, and then book one of Vlad's (who was absent from this installment) story is coming out next year. Maybe we'll see Cat and Bones show up in that? Until Then!