by Garth Nix
This one was been banned for being "vulgar and obscene". I guess I can see where they're coming from, but you can't tell the same story without having some of the horrific bits, and it is a book that is really good.
It's a dystopian book in which there are no adults. Human children are used by machines (similar to The Matrix) and those who do escape don't live to adulthood because they always die in the battle against...well, I forget exactly what they're fighting, but it's something that's pretty nasty.
Despite the depressing picture I'm painting here it is a fun read.
by William Shakespeare
This one has been banned for "gay-positive themes". I find this rather amusing because I don't see the problem.
Twelfth Night is a comedy in which two twins are shipwrecked and separated. They both have their own adventures, with the brother finding a male comrade who falls in love with him (ok, so that's debatable), and the sister masquerading as a man...and falling in love with her master. And then the real fun begins.
It's a great play. My favorite character of all is Feste, who in some portrayals reminds me of Puck from A Midsummer Night's Dream.
Full disclosure: I haven't read all of the Bible, but I've all of Genesis and have studied the Bible in college.
Yes, the Bible has been banned! You name it, the Bible's got it. That's part of why I think it's such a neat book -- it's got love, hate, anger, friendship, betrayal, redemption... But as I said, if you name it, the Bible has it. And that's probably exactly why it has been banned.
Reasons given for banning it include "Lewd, indecent and violent contents", as well as murder, incest, and inappropriate language. I'm sure there have been objections to it for other reasons as well, but these are all that I've found in my limited search.
Handing out Bibles is banned in Saudi Arabia, and throughout history various countries have made it against the rules to have Bibles of one form or another. For example, in 1551 it was unlawful in Spain to have a copy of the Bible written in Spanish. Various translations have been targeted for banning.
Source: http://www.usd320.com/whs/lmc/bbooks.html, http://www.listal.com/list/banned-burned-censored, http://www.oclc.org/research/top1000/bible.htm