Harry Potter and the Philosopher's Stone was published by Bloomsbury, the publisher of all Harry Potter books in the United Kingdom, on 30 June 1997. It was released in the United States on 1 September 1998 by Scholastic—the American publisher of the books—as Harry Potter and the Sorcerer's Stone, after Rowling had received US$105,000 for the American rights—an unprecedented amount for a children's book by a then-unknown author. Fearing that American readers would not associate the word "philosopher" with a magical theme (although the Philosopher's Stone is alchemy-related), Scholastic insisted that the book be given the title Harry Potter and the Sorcerer's Stone for the American market.
The second book, Harry Potter and the Chamber of Secrets was originally published in the UK on 2 July 1998 and in the US on 2 June 1999. Harry Potter and the Prisoner of Azkaban was then published a year later in the UK on 8 July 1999 and in the US on 8 September 1999. Harry Potter and the Goblet of Fire was published on 8 July 2000 at the same time by Bloomsbury and Scholastic. Harry Potter and the Order of the Phoenix is the longest book in the series at 766 pages in the UK version and 870 pages in the US version. It was published worldwide in English on 21 June 2003. Harry Potter and the Half-Blood Prince was published on 16 July 2005, and it sold 9 million copies in the first 24 hours of its worldwide release. The seventh and final novel, Harry Potter and the Deathly Hallows, was published 21 July 2007. The book sold 11 million copies in the first 24 hours of release, breaking down to 2.7 million copies in the UK and 8.3 million in the US.
