What happens when the daughter of a mass murderer falls in love with the son of Satan? That’s what sixteen-year-old Fallon Keyes will find out when her father’s unspeakable crime forces her family to relocate to Lockwood. There, she meets Lucian Locke; a descendant of the town’s founding family and son of Satan. From the moment they meet, they’re drawn together by something neither of them fully understands. While they grow closer, the son of Jesus Christ and his followers do everything they can to come between them in the name of saving Fallon’s eternal soul. Together, she and Lucian find themselves in a battle against the son of Jesus and everything she thought she knew about good and evil is challenged in a way it’s never been before.
http://www.wattpad.com/story/112334-the-unholy-trinity
The synopsis says it all. The series is completed and its a good read..