“The Kreutzer Sonata” is a novella by Leo Tolstoy, written between 1887 and 1889. The work explores themes of marriage, love, sexuality, and jealousy. The protagonist, Pozdnyshev, recounts the story of how he murdered his wife out of jealousy during a train journey. The novella caused considerable public controversy due to the author’s radical views on marriage and sexual relations and was banned by the censorship board upon publication.