Don't waste your time reading "The Godfather". It stinks! But the movie is fanastic! What a conundrum! Usually it's the other way around.

I think that Puzo was good at plot, characters and dialog, but was just no good at writing prose. And he mustn't have had much confidence in his story, because he filled the book with semi-pornographic sex scenes; I suppose it's to keep the reader interested. Well, cut out all that garbage, get rid of the horrendous prose, just let the characters tell the story -- and you pretty much have the screenplay.

I also tried to read "The Sicilian", it was just impossible. I read a bit of "Inside Las Vegas" (non fiction). It was somewhat interesting from an anthropological point of view.