As Harry Potter's third year at Hogwarts School of Witchcraft and Wizardry begins the nation is shaken by the news that a murderer has escaped from the infamously horrible wizard prison of Azkaban. The escapee turns out to be Sirius Black. Many in the wizard world believe that Sirius Black's next target is Harry.
There is yet another new professor teaching Defense Against the Dark Arts at Hogwarts. The shabby man, Professor Lupin, is the first good teacher of the class that Harry and his friends have had. However, there are some strange things about Professor Lupin; why does he keep getting sick, and what is it about crystal balls that scare him so much?
The reader meets more amazing and fantastic creatures including hippogriffs, bogarts and the horrible Dementors that guard Azkaban.
The conclusion of Harry Potter and the Prisoner of Azkaban leads to some fascinating discoveries about the Whomping Willow and the truth about the night Harry's parents were murdered, as well as the secret Professor Lupin has been hiding. Even Scabbers, Ron's rat, has an important role to play. Rowling's style is as enthralling as ever. No fan of Harry Potter should miss this book.