A novel by internationally best-selling authors Steven Savile and Steve Lockley, The Sign of Glaaki pits escape artist Harry Houdini and author Dennis Wheatley against ancient evil, alongside a cast of familiar characters from the Arkham Horror universe! When an actress is brutally murdered on the set of a high-profile horror film, the list of suspects seems endless. But when other bodies begin to appear, it becomes clear that something far more sinister is at work.