From publisher blurb:
Detective Carnacki explores the macabre crimes of the cities of Vathak, both normal and paranormal. He's been given the assignment of exploring criminal factions, strange crimes, and the people or things that haunt the night.
Detective Carnacki’s Serial Killers of Vathak brings you 6 serial killer villains complete with history, descriptions, modus operandi, and stat block. Detective Carnacki’s Serial Killers of Vathak is for the Shadows over Vathak Setting or any Pathfinder Roleplaying Game.