The Turn of the Screw

Written in 1898, The Turn of the Screw is considered as the most famous of ghostly tales. The novella tells the story of a governess who is responsible of caring for two children at a remote estate and soon becomes convinced that the house is haunted. Are the ghosts real or just the figments of the governess' imagination?
The Turn of the Screw is considered a work Gothic/Horror fiction and grabs the reader's attention in the first sentences.