I like A Hat Full Of Sky. But I didn't find this as good.
This is a retold story on the phantom of the opera with witches.
Enjoyable but not as much as the other one with Death and the Watch.
Why? Probably because Agnes is not really doing herself any good by letting Christine steps over her all the time.
Maybe the annoyance is part of the plot. Only half way through this right now.
Starts with a 4 stars and see how it goes.