The Prisoner of Azkaban (Rowling, 1999b)

Loneliness from the absence of parents always sticks to Harry Potter. His aunt and her family exclude him from their lives. The scar on Harry’s forehead and the nightmares showing the scenes through Voldemort’s eyes give Harry severe headaches. Now, Harry finds that his god father, Sirius Black escapes the wizard prison after being imprisoned with a charge of murdering 13 people. When a Firebolt, a fancy racing broomstick for a Quidditch match [a wizarding sports played on broomsticks] is delivered from Harry’s god father, the existence of Sirius brings unexpected joy and curiosity to Harry. The rumor that Sirius Black, returns to kill Harry is found to be wrong. Harry and his friends reveal the evil behavior of Peter Pettigrew [his father’s childhood friend who is called Wormtail] who betrayed many people: sacrificed his friends for the scheme of Voldemort and transformed into Scabbers, Ron’s aged rat to bring a false charge against Sirius Black of being the murderer of his friends, Harry’s parents. Towards the end, Harry and his friends fail an attempt by the wizarding community to capture Sirius. They help him escape and Harry realizes that he has a god father who cares for him.