In the late 60s, Albert Ruddy turned a Mafia book into what's to become one of the greatest films of all time. Where does this offer stand?

Now, here’s an offer you can’t refuse: a sequel that’s hailed as being equal to, if not better than, a film that's already a masterpiece.

Leaping from the pages of Puzo to the reels of Coppola,it became one of the most game-changing films of all time. How did it work its magic?