The book has been internationally popular for more than a half century, selling more than 30 million copies in 40 languages.

[1] Harper Lee and her publisher did not expect To Kill a Mockingbird to be such a huge success.

Since it was first published in 1960, it has sold close to one million copies a year and has been the second-best-selling backlist title in the United States.

Because of this, Mockingbird has become a pillar for students around the country and symbol of justice and the reminiscence of childhood.

[4] In honor of the 50th anniversary, famous authors and celebrities as well as people close to the book's author, Harper Lee, shared their experiences with To Kill a Mockingbird in the book Scout, Atticus, & Boo: A Celebration of Fifty Years of To Kill a Mockingbird.