"Forbidden Colours" is a deeply introspective novel that explores themes of beauty, youth, old age, love, and betrayal, set against the backdrop of post-war Japan. The story follows a young, beautiful man who is manipulated by an elderly writer to seek revenge on women. The young man's beauty becomes a weapon, while the old man's bitterness and jealousy drive the plot. The novel delves into the darker aspects of human nature and society's obsession with beauty, providing a stark commentary on the human condition.

The 1932nd greatest book of all time