Monsters Among Us — T.M. Simmons

Monsters Among Us, a novella, is T. M. Simmons annual Halloween story.
Collin Cassidy, known as The Slayer, has enemies in the demon underground who will do anything to kill him. Faytareena has her own reason for seeking revenge against The Slayer, who killed her demon father and human mother. She's also bound by the contract Baltheezer tricked her into signing, and racing against the approaching deadline that will change her life one way or another: Halloween at midnight.
Come join T. M. Simmons as she takes you deep into the mountains where not only do monsters roam, but good has battled evil through the centuries.