Harry Potter and the Prisoner of Azkaban by J.K. Rowling
Harry Potter, along with his best friends, Ron and Hermione, is about to start his third year at Hogwarts School of Witchcraft and Wizardry. Harry can’t wait to get to school after the summer holidays. (Who wouldn’t if they lived with the horrible Dursley’s?) But when Harry gets to Hogwarts, the atmosphere is tense. There is an escaped mass murderer on the loose and the sinister prison guards of Azkaban have been called to guard the school.