The "Invisible Man" of the title is a young black man, who is "invisible" to white society because of his skin colour...the point is that when they look at him, they see not him,, but a blank screen on which to project their prejudices. There's a LOT more to it, of course.
http://www.amazon.com/exec/obidos/tg/detail/-/0679732764/ref=pd_sxp_f/002-4709848-5119232?v=glance&s=booksAlso, "Brave New World" by Aldous Huxley...makes for an interesting dystopian counterpoint to 1984 (and in some ways is a lot closer to the "future" we're living in now).
http://www.amazon.com/exec/obidos/ASIN/0060929871/qid=1120174533/sr=2-1/ref=pd_bbs_b_2_1/002-4709848-5119232"The Great Gatsby", by F. Scott Fitzgerald...possibly THE "Great American Novel"; subtext is about class differences and the hollowness and futility of the "American Dream".
http://www.amazon.com/exec/obidos/ASIN/0743273567/qid=1120174562/sr=2-1/ref=pd_bbs_b_2_1/002-4709848-5119232"Lolita", by Vladimir Nabokov (or anything else by Nabokov, for that matter)...though Russian by birth, Nabokov wrote some of the most brilliant and beautiful English prose I can think of. It's almost poetic.
http://www.amazon.com/exec/obidos/ASIN/0679723161/qid=1120174591/sr=2-1/ref=pd_bbs_b_2_1/002-4709848-5119232"The Name of the Rose", by Umberto Eco (or, as for Nabokov, any of his other novels); great and entertaining, and Eco has a deep and assured grasp of the mediaeval world he writes about. The English translations of his works (he writes in Italian) are quite good.
http://www.amazon.com/exec/obidos/ASIN/0156001314/qid=1120174614/sr=2-1/ref=pd_bbs_b_2_1/002-4709848-5119232"The Illuminatus! Trilogy", by Robert Anton Wilson & Robert Shea - a great, sprawling, hilarious and uncategorisable blend of conspiracy theory, fantasy, alternate history and much else besides...it's rather "political", in some ways, but certainly doesn't beat you over the head like Ayn Rand tends to (oh, and it makes fun of Rand, too...one of the characters is the author of a book called "Telemachus Sneezed", obviously based on "Atlas Shrugged").
http://www.amazon.com/exec/obidos/tg/detail/-/0440539811/qid=1120174643/sr=8-1/ref=sr_8_xs_ap_i1_xgl14/002-4709848-5119232?v=glance&s=books&n=507846"Erasure", by Percival Everett - a brilliant satire, sort of a literary equivalent to Spike Lee's "Bamboozled"; the main character is a black university professor and author whose books are "too academic" and not "black" enough for his publishers. He's not too happy about the fact that American culture encourages stereotypical depictions of blacks, so he writes a savage satire of a "black" novel...that becomes a best-seller, and creates quite a few problems for him.
http://www.amazon.com/exec/obidos/tg/detail/-/0786888156/qid=1120174672/sr=8-1/ref=sr_8_xs_ap_i1_xgl14/002-4709848-5119232?v=glance&s=books&n=507846I can think of quite a few more, but you're getting enough suggestions that I'll stop here.
Edit to provide Amazon links, so you can take a look at some reviews...