The book "On the defense" (A rebours) by the famous French writer Joris-Karl Huysmans (J.-K. Huysmans) is a masterpiece of French literature, which laid the foundation of symbolism and decadence. The novel tells the story of the aesthetics and moral immersion of a very rich aristocrat Deseslans - a hero of half-Alsatian, half-Flemish nature, who seeks comfort and satisfaction in art and in the pursuit of beauty. "On Defense" is not just a novel, but rather a cult work that influenced the further development of literature and art. Yusmans masterfully reveals the inner world of the hero, his contrasting aspirations and frankly demonstrates his despair in the face of modernity. The book impresses with its refined language, deep psychology and impressive visualization of images. "On Defense" is a work that leaves an indescribably deep mark in the heart and thoughts of the reader, and Yusmans deserves a well-deserved place among the great masters of literature.