Francis Ford Coppola‘s prompt book for The Godfather is several inches thick and contains Mario Puzo’s book The Godfather with note after note by Coppola as he details what parts he wants to extract and emphasize in the movie. The prompt book was the foundation for which he wrote the script.
Coppola explains that the prompt book is a tradition carried over from his theater days. (Before Coppola got a master’s in film at UCLA, he received a theater degree from Hofstra University.) Coppola also says he based his prompt book on one that Elia Kazan had done for A Streetcar Named Desire. Kazan has written several books about his life and films including Kazan on Directing and there are many other books that gleam insights from him that I’m sure was an encouragement to Coppola during his own difficult time of getting The Godfather made.
“When I started On the Waterfront, I was what they call unbankable. Nobody would put up money for me because I had had a series of box office failures…. One of my happiest moments was when I got the Academy Award for On the Waterfront.”
Elia Kazan
Kazan: The Master Director Discusses His Films Interviews with Elia Kazan
Jeff Young
In the below video, Coppola discusses part of the process that he went through in writing the script for The Godfather;
“On page 79 of the book we have the actual shooting of the Don. Whenever I felt there was a really important part of the book that was going to be in the movie I would sit there with my ruler and really underline—so this details the shooting. My margin notes are; THE SHOOTING! GREAT DETAIL. The Don is the main character of the movie, so as in Pyscho , we are totally thrown when he is shot. How would Hitchcock design this? Hitchcock was such a master about manipulating information for the audience, usually telling you things so that you were equipped to enjoy what you were seeing —rather than withholding information, he would give you information.”
Francis Ford Coppola
Screenwriting from Iowa 