"If anyone wants to know about the power of the Mafia—its ruthlessness, its immunity to prosecution—read The Godfather; Mario Puzo's brawling, irresistible tale brings the reality home more vividly and realistically than the drier stuff of fact ever can. The Godfather is loaded with the kind of sexual scenes, plots and counter-plots, murder and gore that seem to be requirements for a novel today. All of this might well have made it a work of cheap sensationalism, but The Godfather is deeply imbedded in reality, and this sense of reality pervades the torrent of unending action."
January 1, 1970
https://en.wikiquote.org/wiki/Mario_Puzo