What is it?
The Forbidden Library is a website featuring only books that have been banned at one time or another, with short commentary on each of the books explaining the reasons behind any past or present banning (at least the ones known).
Why is it cool?
I'm not sure if this section of this post is even necessary. If you've even wondered why people have banned a particular book, this is probably the place to go. Books are listed by title or by author (there are also an about page, censorship quotes page, mailbag page, other sites page, and credits page). You'd be surprised what books have been banned and for what reasons, too! Books have been banned in the past even though the challengers never read whatever it was they were trying to ban! Talk about idiocy!
Give it a look. It's a cool site and might prove interesting for a reading list for your kids or just for yourself (recommended for kids, since corrupting our youth while they're still young is much better than waiting until they are almost adults; books are "evil" after all).