The Picture of Dorian Gray is a novel by Oscar Wilde that explores the themes of decadence and the fin-de-siècle. It tells the story of a young man named Dorian Gray who remains eternally youthful while a portrait of him ages and reflects the corruption of his soul. This book is a classic of English literature and is often considered a masterpiece of aestheticism. Wilde's witty and provocative writing style, combined with his exploration of the darker side of human nature, makes this novel a must-read for anyone interested in the decadent and fin-de-siècle period.