Murder Between the Worlds

In a world where mortal earth and Fairy overlap someone is torturing and killing young women. The police don't have any good leads but they may have a suspect so they turn to Allie McCarthy, occult bookstore owner, to help them understand the ritual behind the murders. Allie wants to help, but solving murders isn't her forte - old, rare books are what she knows best. Unfortunately for her it seem that a book might be at the center of it all, and she is the key to catching someone who definitely doesn't want to be caught. Can Allie help the police find the killer before the killer finds her?