5. The Godfather (1972)
The Book: Italian-American author Mario Puzo’s account of a fictional New York Mafia clan explores the inner workings of the Corleone family as they enter a war with their neighbouring enemies.
The Movie: Declared one of the greatest films ever committed to celluloid, Francis Ford Coppola’s gangster epic put Al Pacino on the map as up-and-coming Mafia boss, Michael Corleone, and follows his reluctant steps into the family business - and of course, his dealings with his father, “Don” Vito Corleone (Marlon Brando). A vast chunk of the novel explained Vito’s background, in particular his climb up the Mafia ladder - all of which was cast aside for the movie. It did, however, form the basis of the sequel.