The third novel is mainly about Sirius Black, Harry's godfather, breaking out of Azkaban prison along with his relationship to Harry Potter. As he is considered an extremely dangerous criminal, the...
it is very much an important film in the series. It is essentially about Harry (as usual) who finds his godfather under the impression that the man led to the murder of his parents. In fact, we find...
If you are referring to the date the book was released. Harry Potter and the Prisoner of Azkaban was released in the UK on July 8th 1999, and was released in the US on September 8th 1999.