'The Turn of the Screw' and Other Stories

Like the other tales collected here - `Sir Edmund Orme', `Owen Wingrave', and `The Friends of the Friends' - `The Turn of the Screw' is to all immediate appearances a ghost story. But are the appearances what they seem? Is what appears to the governess a ghost or a hallucination? Who else sees what she sees? The reader may wonder whether the children are victims of corrup-tion from beyond the grave, or victims of the governess's `infernal imagination', which torments but also entrals her?