William Wilson features an eponymous narrator who is tormented by the existence of a man who is his exact double, right down to his first and last name. The narrator initially meets his doppelganger in primary school, then encounters him again in college, and finally clashes with him in his dissipated adulthood. Wilson ultimately ends up killing his double, though the story’s ambiguous ending implies that the narrator may have actually killed himself. It’s a complex and ambitious story, and arguably prescient in its anticipation of certain psychological principles.