•Why it earns a slot
The Turn of the Screw earns its place as the defining example of the unreliable-narrator ghost story: James constructs the entire horror around a single consciousness whose sincerity cannot be verified, making the death of Miles simultaneously a rescue and a possible act of destruction, a formal achievement that has generated more than a century of critical debate.
A young governess takes charge of two beautiful orphaned children, Miles and Flora, at a remote English estate called Bly, and becomes convinced that the ghosts of two dead former servants, Peter Quint and Miss Jessel, are corrupting the children from beyond the grave. Whether the apparitions are real or products of the governess's obsessive imagination is left radically ambiguous. Her escalating efforts to force a confession from Miles end in the boy's sudden death in her arms.
This distillation is written from the freely available original, which is always the better read when you have the time: gutenberg.org.