Choosing Evil. Ensouled Series, #1

Cursing EvilSerafina Murano is no stranger to the paranormal, nor to evil. All her life she's lived harmoniously alongside demons despite the rage living inside of her. Damon Serpe is a conflicted demon on the ultimate mission: infiltrate Serafina's world. When they collide into each other's lives, they're inexorably drawn to one another. But they're forbidden to be together. Chasing EvilDark, deadly secrets, gut-wrenching betrayal, and elusive questions that have haunted Serafina since childhood resurface in a wicked wrath.
Damon holds the key to her understanding it all, as well as to her existence. If she decides to trust him, he will help decipher her recurring nightmares and unravel the lifelong mysteries tormenting her. Only Damon is harboring secrets far darker than Serafina ever imagined. Choosing EvilTime is running out. Serafina is forced to make an impossible decision. To save humankind, she must sacrifice her soul, choosing to become the very evil she has raged against her entire life.
Embracing her truth won't be easy. It's a fate that will change her, and perhaps the world, forever.