Deal with the Devil Duet

To keep her soul, she'll have to make a deal with the Devil.

The Dark Lady comes for a witch's soul on their eighteenth birthday. That's the way it's always been, but Vivian's instincts are telling her to run.

So she does.

Fleeing from home and denouncing all magic, she spends the next ten years with one foot out the door, terrified that the ruler of Hell will come knocking. But when her suppressed magic finally breaks free and the Dark Lady tracks her down, it's not to claim her soul. Covens have been disappearing under mysterious circumstances and she needs Vivian--and her magic--to stop it.
Using the Dark Lady's desperation, Vivian strikes a bargain: she will help, but only if she gets to keep her soul.

As her connection to both her magic and to the alluring ruler of Hell gets stronger, Vivian uncovers the horrifying truth: there is something far more dangerous than the Devil out there, and it's coming for her.