James Henry James 
Turn of the Screw 

A young governess arrives at Bly, a country home in Essex, England, to care for Miles and Flora, two precocious and pure children. But as ghostly visions take shape, the obsessively protective governess soon fears for the safety of her wards-only to wonder if these hauntings are a conjuring of her own imagination. In challenging what we see and what we believe we see in the dark of the night, The Turn of the Screw stands as one of the boldest and most chilling ghost stories ever told.