The Accidental by Ali Smith is part of the genre of dramatic fiction, literature that often deals with politics and historical issues and relies on metafiction, unreliable narration, and self-reflexivity.
postmodern fiction Postmodern literature is a form of literature that is characterized by the use of metafiction, unreliable narration, self-reflexivity, intertextuality, and which often thematizes both historical and political issues. 
