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 (film series) film series that followed "Harry Potter"s suit. Furthermore, the practice of splitting the finale of a film series into two back-to-back films began with the success of "Deathly Hallows", and it would soon be replicated by "" and "", "" and "", "" and "", and "" and its sequel "". The films are also widely credited with singlehandedly signalling the popularity of films based on children's and young adult literature in the 2000s and 2010s, correlating with the book series' own literary influence. Costance Grady and Aja Romano, commenting on the whole "Harry Potter" franchise's legacy for "Vox" in