The Margin is a psychological and existential novel centered on Sigismond Pons, a man who travels to Barcelona and receives devastating news about his wife. Rather than returning home, he drifts through the city’s nightlife—bars, brothels, and streets—entering a detached, almost surreal state of mind.

The novel explores themes of grief, alienation, sensuality, and identity, blending philosophical introspection with vivid, often provocative imagery. Mandiargues’ writing is known for its poetic and dreamlike style, making this a notable work of modern European literature.