Magic in Harry Potter extraordinarily high turnover of staff members—throughout the series no Defence Against the Dark Arts teacher has retained the post for more than one school year. Harry is exceptionally skilled in this subject. During the period the story takes place, the class is taught by Quirinus Quirrell (book one), Gilderoy Lockhart (book two), Remus Lupin (book three), Bartemius Crouch Jr impersonating Alastor "Mad-eye" Moody (book four), Dolores Umbridge (book five), Severus Snape (book six), and Amycus Carrow (book seven). Hagrid suggests in "Harry Potter and the Chamber of Secrets" that ""They're startin' ter think the job's jinxed. No one's lasted long
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