J.K. Rowling

As Harry begins his third year at Hogwarts, a shadow falls over the school — notorious mass murderer Sirius Black has escaped from the impenetrable fortress of Azkaban, and all signs point to him being after Harry. To make matters worse, the school is now patrolled by Dementors, the soul-draining guards of Azkaban, whose presence alone is enough to fill anyone with overwhelming dread. While Harry tries to focus on his studies and Quidditch, the threat of Sirius grows ever closer. But as the truth about Sirius Black and his connection to Harry’s past slowly comes to light, nothing — and no one — turns out to be quite what they seemed.