Once again I haven't entered. I don't relate. Apparently it's because I'm Canadian, eh? And...up here we just don't tend to ban books. Maybe it's our long winters; likely we need all the reading material we can get. I dunno.
It's not to say we've never banned books in Canada; it's just that we don't tend to do so. I'm not sure any of the books we once banned are still banned. I'd guess not. According to Wikipedia, there is at least a short list of books that were once banned in Canada, but I know that my mom read one years ago with her Book Club (and she died in 2004), so you can imagine it's not likely banned now.
There is a list of "Books That Have Shaped America", compiled by the U.S. Library of Congress. The ones identified as once banned or challenged is lengthy, but if you're Canadian, and studied English Lit in junior and/or senior high, I'll bet you read some of these titles.
Here are some I've read (whether in school or out):
Nowadays there are undoubtedly books I'd not want my children reading (if they weren't already adults living on their own). The Fifty Shades series and just about anything glorifying vampires would be included in that number. I don't believe that exposure to gratuitous sex, violence, or demonic personages is edifying or uplifting -- but now that my children are adults, if they choose to pollute their minds, so be it.
I do believe that you are not only what you eat, but also what you think about (dwell on).