The Sicilian
written by Mario Puzo
part of The Godfather

The Godfather is a crime novel that tells the story of a fictitious Sicilian Mafia family based in New York City (and Long Beach, NY) and headed by Don Vito Corleone, who became synonymous with the Italian Mafia. The novel covers the years 1945 to 1955, and also provides the backstory of Vito Corleone from early childhood to adulthood.

The bulk of the novel focuses on the life of Salvatore Guiliano and how he rose to his legendary status as a bandit and hero to the Sicilian people. He was born in the village of Montelepre, west of Palermo. His godfather, Hector Adonis, a small man tormented his entire life for his small stature, was a professor of history and literature at the University of Palermo. He is a very close personal friend of the Guiliano family, a mentor for Turi, and a man who caters to the Friends of the Friends (the word Mafia is rarely spoken in Sicily).

The Godfather Returns is a novel written by author Mark Winegardner, published in 2004. It is the sequel to Mario Puzo's The Godfather, which was originally published in 1969, and The Sicilian (1984). As the original novel covered the years 1945 to 1955, and included significant backstory on Don Vito Corleone's life since childhood, Returns covers the years 1955 to 1962, and includes significant backstory on Michael Corleone's life prior to the first novel. The story picks up immediately after the end of the first novel. The events of the film The Godfather Part II take place within the time frame of this novel, but are only mentioned in the background. Many of Puzo's characters are expanded upon, especially Fredo Corleone, Tom Hagen, and Johnny Fontane, and new characters like Nick Geraci and Francesca Corleone are introduced. The other half of the novel goes deeper into Michael's role as Don and his dream of becoming legitimate. The novel expands on Michael's service in World War II as well as his brother Fredo's secret life; it is revealed in this novel that Fredo is a homosexual, which drew significant disapproval from many fans of the series. The novel shows how Sonny, Fredo and Tom Hagen join the family business, as well as the deaths of Pete Clemenza and Sal Tessio.

The Godfather's Revenge, a 2006 novel written by author Mark Winegardner, is the sequel to The Godfather, The Sicilian, and The Godfather Returns. The story takes place from 1963-1964, and picks up the story from where The Godfather Returns left off. The novel deals with the escalation of Michael's uncertainty, his regret, and his guilt-ridden conscience, with Nick Geraci's plots of revenge, with Tom Hagen's being implicated in a murder, and organized crime's battle with a presidential family (the Sheas, who are analogous to the Kennedy family).