Traditional detective fiction celebrates the victory of order and reason over the senseless violence of crime. Yet in spite of its apparent valorization of rationality, the detective genre has been associated from its inception with three paradoxical motifs - the double, the labyrinth and the locked room. Rational thought relies on binary oppositions, such as chaos and order, appearance and reality or truth and falsehood. Paradoxes subvert such customary distinctions, logically proving as true what we experientially know to be false.The present book explores detective and crime-mystery fiction and film from the perspective of their entrenched metaphors of paradox. This new and intriguing angle yields fresh insights into a genre that has become one of the hallmarks of postmodernism.