http://www.ala.org/advocacy/banned/frequentlychallenged/challengedbydecade/2000_2009
Buy 'em all if you can. Those that I've read on this list were very, VERY good. If I had the bucks and expected to be alive in a years time, I'd get every last one of 'em in hard cover, since I don't really like reading books on-line.