Well of Souls by Linsey Hall

I never imagined that owning a haunted bookstore in New Orleans would be my future, but here I am. For the first time in my miserable life, I’m happy. I have a home.
But when my closest friend is cursed by an unknown spell, I realize there’s something far darker going on in New Orleans. Fiona has only days left before she’s destroyed forever, and I’ll do anything to save her—including teaming up with the demon lord who haunts my dreams with his devastating kisses.
Because it’s not just my friend who is in trouble. It’s people all over town. One by one, demons are disappearing. The only way to save them is to team up with Talan, but I know that I can’t trust the seductive demon. He’s too powerful and ruthless, with too many secrets.
As for my own secrets? If they get out, I’m dead.