'Captain Underpants' topped the list of the most banned and challenged books of 2013 for its offensive language and material not suited for the target age group.

Sherman Alexie's prize-winning 'The Absolutely True Diary of a Part-Time Indian' ranked No. 3 for its drug references, sexual content and racism followed by E L James' 'Fifty Shades of Grey' and Suzanne Collins' 'The Hunger Games'.
Others in the top 10 were Tanya Lee Stone's 'A Bad Boy Can Be Good for A Girl', John Green's 'Looking for Alaska', Stephen Chbosky's 'The Perks of Being a Wallflower', Rudolfo Anaya's 'Bless Me, Ultima' and Jeff Smith's 'Bone' series.
Source-ANI