Harry Potter and the Prisoner of Azkaban is the third novel in the Harry Potter series written by J. K. Rowling. The book was published on 8 July 1999. The novel won the 1999 Whitbread Book Award, the Bram Stoker Award, the 2000 Locus Award for Best Fantasy Novel, and was short-listed for other awards, including the Hugo. This placed the novel among the most-honoured works of fantasy in recent history. A film based on the novel was released on 31 May 2004, in the United Kingdom and 4 June 2004 in the U.S. and many other countries. This is the only novel in the series that does not feature Lord Voldemort in some form.
Harry and his friends Ron Weasley and Hermione Granger return to Hogwarts School of Witchcraft and Wizardry and find security has been tightened because of Sirius Black's escape. The grounds are now guarded by Dementors, dark, sinister beings that drain the happiness of anyone nearby and guard Azkaban prison. They also cause Harry to hear his parents. Professor Remus Lupin, the school's new Defence Against the Dark Arts teacher, tells Harry he is more vulnerable to the Dementors because he has seen genuine horrors in his past. He agrees to teach Harry the Patronus...