Jackaby by William Ritter
It’s 1892 and Abigail Rook has arrived in New England searching for a job. Assisting R. F. Jackaby, an investigator of the supernatural, seems like the perfect fit. Unfortunately, a serial killer is on the loose, and the police do not believe that the culprit is, as Jackaby, suspects, not of this world. An exciting start to a series that combines mystery and romance with the supernatural.