Premise: Italo Calvino (] ; 15 October 1923 – 19 September 1985) was an Italian journalist and writer of short stories and novels. His best known works include the "Our Ancestors" trilogy (1952–1959), the "Cosmicomics" collection of short stories (1965), and the novels "Invisible Cities" (1972) and "If on a winter's night a traveler" (1979).
Hypothesis: One of Italo Calvino's best known works was written before he died in 1985.