À rebours, translated as Against Nature, is a decadent novel by Joris-Karl Huysmans. It follows the life of Jean des Esseintes, an eccentric aristocrat who retreats from society to indulge in his extravagant and perverse desires. Huysmans' novel is a seminal work of the fin-de-siècle period, exploring themes of aestheticism, decadence, and the rejection of societal norms.