I am not favoring the idea of making a part IV movie, however the book doesn't seem as bad an idea. The movie would have too many problems with casting, studio work, stroyline,etc.; the whole thing is just too much of a gamble. Why mess with something that is already perfect?

Since Mario Puzo is no longer with us (may he rest in peace), Coppola should have the only saying as to what the book should cover, if/when it ever comes out.