"Adultery" is a novel by Paulo Coelho, first published in 2014. The story follows Linda, a successful journalist living in Geneva, who seems to have a perfect life—a stable marriage, a good career, and financial security. However, she struggles with a deep sense of emptiness and monotony. When she unexpectedly reconnects with a former boyfriend, she embarks on an affair that challenges her perception of happiness, morality, and self-fulfillment. Through this psychological and emotional journey, Coelho explores themes of passion, desire, and the search for meaning in modern life.