Who is the Italian author of the book 'The Leopard'?

Giuseppe Tomasi di Lampedusa (December 23, 1896 - July 23, 1957) is the author of the novel "The Leopard".

Specifically, the book in question actually is called Il Gattopardi in Italian. It was completed in 1956. But the historical novel was not published until 1958, the year after the author's death.