A novel by Reginald D Groff
"Werewolf? Do you think you're living in some Hollywood film? No, they and vampires and the other movie creatures are fairy tales, ways of explaining the unexplaineble. Don't you understand? Our queen summoned the Dark One to save you: Satan himself. Do you think the most powerful evil that has ever existed would want to change you or anyone else into some kind of wolf, bat, or other animal as some kind of pitiful joke? No, you are a gateway. In order to save you, Milema has destroyed you, and there is nothing you can do to change it. She made a pact between you and the devil. The evil one gave you eternal youth and life. In exchange, a demon from hell becomes a living, breathing thing in your body for three days each month. That's what your nightmares have been. Hell calling you to let its messenger enter you, to give an evil spirit form and substance. The one thing that God has denied Lucifer."
Used availability for Reginald D Groff's The Return