Night Life (Nocturne City, Book 1)

Welcome to Nocturne City, where werewolves, black magicians, and witches prowl the streets at night… Among them is Luna Wilder, a tough-as-nails police officer whose job is to keep the peace. As an Insoli werewolf, Luna travels without a pack and must rely on instinct alone. And she's just been assigned to find the ruthless killer behind a string of ritualistic murders—a killer with ties to an escaped demon found only in legend…until now.