Harry Potter and the Prisoner of Azkaban is the fourth and most famous book in the Harry Potter series. This novel has a strong fantasy element, telling the story of Harry Potter and his friends who are trapped in a dangerous magical world in search of a mysterious sorcerer's stone and encounter a series of dangerous challenges and adventures. In addition to its wonderful storyline and unique magical setting, Harry Potter and the Prisoner of Azkaban was also known for its deep character portrayals and thrilling plot developments. The characters in the novel had their own unique characteristics and rich inner worlds and emotional experiences, making this novel very popular among readers. Therefore, Harry Potter and the Prisoner of Azkaban was not only an excellent novel, but also the most classic and popular of the Harry Potter series.