Harry Potter and the Prisoner of Azkaban Harry Potter and the Prisoner of Azkaban Harry Potter and the Prisoner of Azkaban is a fantasy novel written by British author J. K. Rowling and the third in the "Harry Potter" series. The book follows Harry Potter, a young wizard, in his third year at Hogwarts School of Witchcraft and Wizardry. Along with friends Ronald Weasley and Hermione Granger, Harry investigates Sirius Black, an escaped prisoner from Azkaban who they believe is one of Lord Voldemort's old allies. The book was published in the United Kingdom on 8 July 1999 by Bloomsbury and in the United States on 8
Harry Potter and the Half-Blood Prince 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", the longest novel in the Harry Potter series, was released 21 June 2003. After the publishing of "Harry Potter and the Half-Blood Prince", the seventh and final novel, "Harry Potter and the Deathly Hallows", was released 21 July 2007. 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. Rowling stated that