Lists of greatest books are usually pretty shite, not least because you haven't read most of them (and when I say 'you' I mean 'I'). Not only do I do slightly better than normal with Larry McCaffery's 20th Century Greatest Hits but all the ones I haven't read sound great, too.
Larry is a prof at San Diego State University and also invented the term "avant pop," but don't hold that against him. He likes lots of good books that never usually get a shout on these lists. Give it up for Larry..!