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.[57][58] 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.[57][58] Harry Potter and the Goblet of Fire was published on 8 July 2000 at the same time by Bloomsbury and Scholastic.[59] 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.[60] It was published worldwide in English on 21 June 2003.[61] Harry Potter and the Half-Blood Prince was published on 16 July 2005 and sold 11 million copies in the first 24 hours of its worldwide release.[62][63] The seventh and final novel, Harry Potter and the Deathly Hallows, was published on 21 July 2007.[64] The book sold 11 million copies within 24 hours of its release: 2.7 million copies in the UK and 8.3 million in the US.[65]