The American Library Association‘s Banned Books Week is held in the last week of September each year. 
Their aim is to “highlight the benefits of free and open access to information while drawing attention to the harms of censorship by spotlighting actual or attempted bannings of books across the United States.”
The ALA website gives lists of the most commonly challenged books, arranged by year.

Here’s the list for 2009. If you want to know the reasons for the complaints made about these titles, visit the website.

1. ttyl; ttfn; l8r, g8r (series) by Lauren Myracle

2. And Tango Makes Three by Peter Parnell and Justin Richardson

3. The Perks of Being A Wallflower by Stephen Chbosky

4. To Kill A Mockingbird by Harper Lee

5. Twilight; New Moon; Eclipse; Breaking Dawn (series) by Stephenie Meyer

6. The Catcher in the Rye by J.D. Salinger

7. My Sister’s Keeper by Jodi Picoult

8. The Earth, My Butt, and Other Big, Round Things by Carolyn Mackler

9. The Color Purple by Alice Walker

10. The Chocolate War by Robert Cormier

What do you think about the list?