The supernatural compulsion that immediately ties the two protagonists together.
Described as "explicit and plentiful" with high sexual tension. Devil's Mark (The Reckless Damned, #1) - Goodreads Devil’s Mark by Lark Taylor
A fresh take on angels and demons that avoids purely "good vs. evil" religious tropes. The supernatural compulsion that immediately ties the two
Headless bodies are being left in Cal's bookshop by an unknown demon, putting Oscar in danger. putting Oscar in danger.