*Harry Potter and the Prisoner of Azkaban* is the third book in J.K. Rowling’s magical series. In this installment, Harry returns to Hogwarts School of Witchcraft and Wizardry for his third year, where he learns that Sirius Black, a dangerous prisoner who escaped from Azkaban, is believed to be hunting him. As Harry uncovers the truth about Sirius Black, he also learns more about his own family’s past and the true nature of his parents’ deaths. The book introduces new magical elements, such as the Marauder’s Map and the concept of Dementors, and explores themes of loyalty, identity, and the complexity of human relationships.