From the award-winning writer of Seven Kinds of Hell comes an intriguing new tale that brings the supernatural thrills from the Fangborn globe to Sherlock Holmes’s nineteenth-century London. On the surface, Amelia Vernet appears to be the great detective’s tranquil sixteen-year-old cousin. But her innocent exterior conceals an important reality: Amelia is a member from the Fangborn, a secret family of werewolves, vampires, and oracles sworn to safeguard Ordinary human beings, and she uses her Fangborn werewolf presents to help Holmes solve the curious cases that mix the doorstep of 221B Baker Street. When the Baker Street Irregulars arrive at Holmes’s home with an unconscious son in tow and reports of the kidnapping, the detective and Amelia springtime into action-but the situation quickly proves to become most perplexing certainly. So when they realize their fresh enemy’s terrible intentions, the pair must fight with all their wits and power before their lives-and those of most Fangborn-are destroyed forever.