Convict Grade by Azrael Paul Damien

Convict Grade, a small town in Montana, attracts tourists due to legends of how the entire community vanished a hundred years earlier. Unbeknownst to the residents, an ancient, evil army is accidentally released once again. The story follows four teens that find themselves face to face with the demons and are thrown into a desperate struggle for survival. Brought together by a strange, common dream, they discover friendship, strength, and love as they fight against the evil horde and uncover secrets from the past to help them prepare for the final, decisive battle, and the fate that awaits them.