In Harry Potter and the Prisoner of Azkaban, Harry, Ron and Hermione, now
teenagers, return for their third year at Hogwarts, where they are forced to
face escaped prisoner, Sirius Black, who poses a great threat to Harry. Harry
and his friends spend their third year learning how to handle a half-horse
half-eagle Hippogriff, repel shape-shifting Boggarts and master the art of
Divination. They also visit the wizarding village of Hogsmeade and the Shrieking
Shack, which is considered the most haunted building in Britain. In addition to
these new experiences, Harry must overcome the threats of the soul-sucking
Dementors, outsmart a dangerous werewolf and finally deal with the truth about
Sirius Black and his relationship to Harry and his parents. With his best
friends, Harry masters advanced magic, crosses the barriers of time and changes
the course of more than one life.