This is the ninth book in the series, and sees Morgan, Tamwood and Jenks travel across the US with their arch nemesis, Trent Kalamack, in an attempt to clear her name. She was shunned in a previous book for the use of black magic (shunning is the witchly equivalent of being sent to Coventry), and that’s obviously having a serious impact on her business (and lifestyle).
This is the best book that Harrison has written for the series in a while. Previous books that have been written recently tend to meander, and see Morgan come across as pouty and whiney. This book, in comparison sees a simple set of linear events occur. They go on a road trip, battle hit men who are trying to kill Kalamack and a demon who's trying to kill them, present their case to the witches council, battle the demon again (he just won't take no for an answer), and generally save the day. The book is so much better because of that simple linearity of the narrative.