Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A key reference

Icons of Horror and the Supernatural: An Encyclopedia of Our Worst Nightmares covers the mythos, horrors and ideas of horror in supernatural literature and genre mediums. From evolving concepts of haunted houses and motivators for writing The Exorcist to the history and psychology of the doppleganger, ICONS OF HORROR AND THE SUPERNATURAL compiles historical, literary and psychological references under one cover and represents a key reference for any college-level collection.Diane C. DonovanCalifornia Bookwatch