Every version of Harry Potter and the Prisoner of Azkaban — the books & films, compared across media.
The story of Harry Potter's third year at Hogwarts — where escaped prisoner Sirius Black looms as a threat and the Knight Bus arrives to upend an already far-from-ordinary life — exists in both print and on screen. Harry Potter and the Prisoner of Azkaban as novel and as film carries the same dangerous mystery and the same young wizard navigating a world where the past refuses to stay locked away.
Yes. Harry Potter and the Prisoner of Azkaban began as a novel published in 1999. The 2004 film of the same name is a direct adaptation of that book, following Harry through the threat posed by escaped prisoner Sirius Black.
There are two versions available here: the 1999 novel Harry Potter and the Prisoner of Azkaban and the 2004 film adaptation of the same name, both telling the story of Sirius Black's escape and the danger it brings to Harry.
If you enjoy reading, the 1999 novel Harry Potter and the Prisoner of Azkaban is the source of the story. If you prefer film, the 2004 Harry Potter and the Prisoner of Azkaban brings the same tale of Sirius Black's escape to the screen.