Harry Potter will help raise funds for the American Booksellers Foundation for Free Expression (ABFFE), ABFFE announced today. Warner Brothers, the producer of the movies based on J.K. Rowling’s Harry Potter books, including Harry Potter and the Prisoner of Azkaban, which opens June 4, has authorized ABFFE to issue a limited edition T-shirt and button that urge people to “Fight for Harry Potter and Free Speech for Kids!” Proceeds will support ABFFE’s anti-censorship activities, which have included two successful efforts to overturn bans on Harry Potter books in school libraries. “We are very grateful to Warner Brothers for the opportunity to offer a Harry Potter shirt and button that promote the freedom to read,” ABFFE President Chris Finan said. The new T-shirt and button, which are based on the cover art for Harry Potter and the Order of the Phoenix, may be purchased individually or for resale. Individual T-shirts are $20; for quantities of 12 or more, the price is $10. A bag of 100 buttons is $50. ABFFE members receive a discount.