Morgaine and Asmodeus [The Morgaine Chronicles #5]

A modern witch, Morgaine, to save the soul of the man she loves, has sacrificed her own soul to the demon Asmodeus. Now a demon, she is returned to Earth by Asmodeus after swearing to carry out his new plan for acquiring Michael's soul. But, Morgaine has a devious plan of her own, and if it's successful, she will be able to outwit Asmodeus, reclaim her life, and save Michael's. But to carry out her plan, Morgaine will have to destroy the soul of an innocent young woman and trick the master trickster, Asmodeus. If she fails, she and Michael will be sentenced to suffer the worst tortures of hell, for all eternity!