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EL James' sexually explicit book wasn't as highly contested as a children's graphic novel about a caped crusader who fights crime in his underwear.
alex gino Banned Books Week
Fifty Shades of Grey' Beaten by 'Captain Underpants' as Most Challenged Book
Captain Underpants,' Toni Morrison books among most 'challenged
Alexa Girkout – The Hollywood Reporter
Bible, 'Fifty Shades' among most challenged books
BannedBooksWeek: Captain Underpants! – Eclectic Alli
Fifty Shades of Grey' Beaten by 'Bionic Booger Boy' on Most-Offensive Book List - TheWrap
Why 'Captain Underpants' author Dav Pilkey played hard to get with Hollywood - Los Angeles Times
Protect Your Freedom to Read - Banned Books - Research Guides at Southern Illinois University
25 Most Banned Books in America - 24/7 Wall St.
Captain Underpants' tops list of most challenged books in 2013
Why 'Captain Underpants' author Dav Pilkey played hard to get with Hollywood
