Kingdom of the Wicked by Kerri Maniscalco

This is the first book in this series. After her twin sister is murdered, Emilia, a Sicilian witch, summons a Prince of Hell named Wrath to help her find the killer.

This book contains: alcohol, blackmail, body horror, controversial religious commentary, dark content, death, deception, depression, divination, gore, grief, magical compulsion, murder, profanity, satan worship, self-harm (witchcraft), sexual activities/nudity, stalking, torture, toxic relationships and violence.