"Letters on Demonology and Witchcraft" by Walter Scott

Sir Walter Scott wrote Letters on Demonology and Witchcraft at the behest of his son-in-law, J. G. Lockhart, who worked for a publishing firm and was a study of witchcraft and the supernatural. Throughout the 19th century, it exercised a significant influence in promoting the Victorian penchant for Gothic and ghostly fiction. Even today, it's a highly sought-after reference text for fans of the supernatural.