The subplot involving Johnny Fontane in Hollywood was not filmed. The most significant deviation of the film from the novel was that the latter had a more positive ending than the film in which Kay Corleone accepts Michael's decision to take over his father's business. The film ends with Kay's realization of Michael's callousness, a theme that would develop in the second and third films, which are largely not based on the original novel. Vito Corleone's backstory appeared in the second film, with his character portrayed by Robert De Niro. Sequels In 1984, Puzo's literary sequel to The Godfather was published. Titled The Sicilian, it chronicles the life of "Giuliano" (Salvatore Giuliano) but the Corleone family is featured heavily throughout, Michael Corleone in particular. Chronologically this story sits between Michael's exile to Sicily in 1950 and his return to the United States. For copyright reasons, the Corleone family involvement was cut from the Michael Cimino film adaptation, which is not considered part of the Godfather film series. In 2004, Random House published a sequel to Puzo's The Godfather, The Godfather Returns, by Mark Winegardner. A further sequel by Winegardner, The Godfather's Revenge, was released in 2006. These novels continue the story from Puzo's novel. The Godfather Returns picks up the story immediately after the end of Puzo's The Godfather. It covers the years 1955 to 1962, as well as providing significant backstory for Michael Corleone's character prior to the events of the first novel. The events of the film The Godfather Part II all take place within the timeframe of this novel, but are only mentioned in the background. The novel contains an appendix that attempts to correlate the events of the novels with the events of the films. The Godfather's Revenge covers the years 1963 to 1964. Continuing Puzo's habit, as seen in The Godfather, of featuring characters who are close analogs of real-life events and public figures (as Johnny Fontane is an analog of Frank Sinatra), Winegardner features in his two Godfather novels analogs of Joseph, John F. and Robert F. Kennedy, as well as alleged organized crime figure Carlos Marcello (Carlo Tramonti). In The Godfather Returns, Winegardner also dramatizes the sweep of organized crime arrests that took place in Apalachin, New York, in 1957. Winegardner uses all of the characters from the Puzo novels and created a few of his own, most notably Nick Geraci, a Corleone