Year Three at Hogwarts means new fun and challenges as Harry learns the delicate art of approaching a Hippogriff, transforming shape-shifting Boggarts into hilarity and even turning back time. But the term also brings danger. Soul-sucking Dementors hover over the school. An ally of the accursed He-Who-Cannot-Be-Named lurks within the castle walls. Fearsome wizard Sirius Black escapes Azkaban. And Harry will be forced to confront them all.