One year after its publication To Kill a Mockingbird had been translated into ten languages. In the years since, it has sold more than 30 million copies and been translated into more than <answer>40</answer> languages. The novel has never been out of print in hardcover or paperback, and has become part of the standard literature curriculum. A 2008 survey of secondary books read by students between grades 9–12 in the U.S. indicates the novel is the most widely read book in these grades. A 1991 survey by the Book of the Month Club and the Library of Congress Center for the Book found that To Kill a Mockingbird was rated behind only the Bible in books that are "most often cited as making a difference".[note 1] It is considered by some to be the Great American Novel.
Up til today, how many languages has To Kill a Mockingbird been printed in?
40