The Sinner and the Scholar by Lana Pecherczyk

Amidst darkness and sin, two unlikely souls find themselves twisted in a forbidden affair that could cost them everything.

Thea, a stunning beauty with a troubled past, was ripped from an orphanage by the Hildegard Sisterhood for her wicked ways. Trained as a seductive assassin, she’s given a purpose as a Sinner: to bring balance to a world designed by men. She never expected the arrival of an arrogant scholar from the all-male Team Saint to bring her to her knees.
Wesley is a relentless demon hunter for the most mysterious entity in the world—the Vatican. His mission is simple: destroy evil wherever it may hide. But when sassy and smart Thea ruffles his feathers, he can’t resist falling into temptation. She’s the one he’s been searching for his entire life, but she belongs to the Sisterhood, an organization he’s sworn to destroy.
Thea and Wesley’s worlds collide when they discover a lost prophecy has the key to saving a loved one in each of their lives—but it will only work for one.
“Forgive me, Father, for I have sinned… I killed a man.”

The Sinner Sisterhood is a dark, steamy paranormal romance series featuring five bad girls fated to save the world… but only if they first make peace with their dark sides. If you enjoy stories like Buffy, Constantine, The DaVinci Code, and Supernatural… but want more soul-shattering romance, found family shenanigans, unapologetic heroines, and the men who would sacrifice the world to love them, then this is for you.
**Please Note: This series touches on taboo and dark topics, has explicit sexual content, violence, and is unsuitable for the young or those sensitive about religion, horror, and demons. HEA guaranteed.