À rebours, translated as Against Nature or Against the Grain, is a novel by Joris-Karl Huysmans. It follows the life of Jean des Esseintes, an aristocrat who withdraws from society to live a life of decadence and aestheticism. The book explores themes of artifice, individualism, and the rejection of societal norms. Huysmans' detailed descriptions and psychological insights make this novel a significant work of the fin-de-siècle period.