Banned Books Week celebrates the freedom to read even controversial authors like Phyllis Reynolds Naylor and Judy Blume, whose books about teenage sexuality have drawn fire.
'Twilight' debuted as a top challenged book in 2009, while the 'Harry Potter' series tops the list of most frequently challenged books over the past decade for its depictions of witchcraft.
Find out more about celebrating Banned Books Week, including how many books were challenged last year and the difference between a challenge and a ban.
