In November 2003, Guinness World Records celebrated the publication of its 100 millionth copy! This confirms that, excluding non-copyright works such as the Bible and the Koran, the definitive book of world records is the world's best selling book.

It was first published in October 1955 by Guinness Superlatives, a subsidiary of Arthur Guinness Son Co. (Park Royal) Ltd and has since gone global, selling in some 37 languages.Comparatively, the five Harry Potter books to date have sold over 100 million copies, and Mao Tse-Tung's Little Red Book was sold or given away to around 900 million.