You know, I think it's like Tom Sawyer vs. Huckleberry Finn, or Alice in the Wonderland vs. Through the Looking-Glass. The first, the original parts are true classics - they are fresh, vibrant with originality and this vital force that makes a unique, outstanding book; the sequels - I know the word doesn't fit, but I can't think of a better one at the moment - are, on the other hand, subtler, deeper, more personal, - more lyrical.