A Scotland Yard Inspector hunts something more dangerous than werewolves through the gaslit streets of London.

Royston Jones, unacknowledged bastard of a high-born family, is determined to track the killer before more young women fall to his knife. But his investigation puts him in the way of a lord who is a clandestine werewolf and the man's fiance, a woman alchemist with attitude and a secret of her own.

Will they destroy Royston to protect their covert identities, or will they join with him to hunt the hunter?

First in the award-winning Werewolves and Gaslight Mysteries.