What is the author's style in Harry Potter and the Prisoner of Azkaban by J. K. Rowling?

Harry Potter and the Prisoner of Azkaban is told in 3rd person limited Point of View, with the narrator unidentified and invisible. The tone is objective. Harry is the character whose thoughts, feelings and experiences are revealed to the reader. The narrator mostly relays events as they happen and also reveals some, but not all, of the thoughts and feelings of the main character Harry Potter. The actions and thoughts of the other characters are relayed to the reader via the conversations between the characters themselves. The actions of the main characters and the narrative descriptions of them tell the reader what type of person they are. The characters and places are not always accounted by the narrator, sometimes they are described through the eyes of Harry.