The Demon Equilibrium

Grace Carter, a "source" of magic, has spent the last nine months searching for Maggie Mulvaney, her "catalyst." The joy of reuniting with her partner—and her lover—is thwarted by her worst fear: Maggie remembers neither Grace nor their life together in the Order of Saint Teresa, the centuries-old organization that trained them to be the strongest demon-hunting duo in generations.

When Maggie and Grace unexpectedly come face-to-face with the demon Horde, they are forced to team up once again...