Five one-hit wonder novelists

One of five authors who became famous after publishing a single novel and never published another one, as tagged by John Bardinelli at The Barnes & Noble Book Blog:
The Leopard, by Giuseppe di Lampedusa

The Sicilian-born Lampedusa was a man who preferred solitude over the company of others. His sister died of diphtheria at a young age, leaving him an only child with a cold and detached father.