After Betsy killed the Devil, her sister Laura has assumed the role of Satan and puts her in charge of all things earth-bound: her vampire husband Sinclair, best friend Jessica in her sixth (and hopefully last) trimester, and her and Sinclair's adopted little BabyJon.
Looking for more like this? See books like Undead and unsure.
Severity reflects intensity, not value -- “central theme” means a warning is a core part of the book, not that the book is bad.