The hunt for a serial killer leads a private detective to Victorian London’s most powerful secret society in this “marvelously wrought” historical mystery (Kirkus Reviews).

When a twelve-year-old girl from the upper classes goes missing in the East End, enquiry agent Cyrus Barker assume her kidnapping is the work of white slavers. But when they discover five girls have been murdered in Bethnal Green, taunting letters begin to arrive in Craig’s Court from a killer calling himself Mr. Miacca.

Barker fears that Miacca might be part of the Hellfire Club, a group of powerful, hedonistic aristocrats performing Satanic rituals. He must track the fiend to his hideout, while his ex-con assistant Thomas Llewelyn confronts the man who put him in prison.

The Hellfire Conspiracy is another wild ride that “brings to life a London roiling with secret leagues, deadly organizations, and hidden clubs” (Ron Bernas, Detroit Free Press).