The Mysteries of Udolpho: A Romance Interspersed with Some Pieces of Poetry

According to Wikipedia: "Ann Radcliffe (9 July 1764 - 7 February 1823) was an English author, a pioneer of the gothic novel. She published as Mrs. Radcliffe. It was her technique of the explained supernatural, in which every seemingly supernatural intrusion is eventually traced back to natural causes, and the impeccable conduct of her heroines that finally met with the approval of the reviewers, transforming the gothic novel into something socially acceptable.