The final installment of the New York Times bestselling Haunting of Sunshine Girl trilogy (based on the hit YouTube channel, and in development for television) about a girl who can communicate with ghosts. Is Sunshine Griffith who she thinks she is? Now that her luiseach powers are fully awakened, and having barely survived an abyss full of demons at the end of Book Two, Sunshine must figure out who-or what-has been organizing the forces of darkness against her.

Thanks to her brainiac boyfriend, Nolan, they not only unearth that Sunshine's death would trigger a calamitous event, but that all civilization depends on her survival. So when an unexpected event unleashes a fierce war between the luiseach and the demon army, Sunshine will learn a shocking truth about herself. Can she bring herself to make the ultimate sacrifice to save humankind?