One Grave at a Time (Night Huntress #6)

How do you send a killer to the grave when he's already dead?

Centuries ago, Heinrich Kramer was a witch hunter. Now, every All Hallows Eve, he takes physical form to torture innocent women before burning them alive. This year, vampires Cat and husband Crispin "Bones" risk all to send him to the other side of eternity forever -- or dig their own graves.