Grim

Monsters don't exist. Period. Unless they do...
Nothing can convince Ayla to believe in the things that go bump in the night. Not her grandfather's insistence that he's some sort of wizard. Not her friend's spine-tingling stories of witchcraft and dark magic that haunted her dreams until her friend disappeared. And her nightmares after that. Then she gets 'the text'. And since it's from Sarah, alive and well after three years, Ayla will do what she must to help. Even if it means breaking into the abandoned Gothic cathedral in the middle of town. At midnight. Alone. But while she's prepared to face whatever dangers lurk in a creepy church in the middle of the night, she couldn't possibly be ready to face what she finds when she arrives... Readers who love Luanne Bennett and Amanda Bouchet will enjoy Grim.
Pick it up today and see if you believe in monsters.