Harry Potter and the Prisoner of Azkaban attacked by a big black dog, which Harry has seen several times before. The dog drags Ron through a tunnel under the Whomping Willow into the Shrieking Shack. Harry and Hermione follow, and there is a brief standoff when they find Ron with Sirius Black, who has transformed from the dog. Lupin enters, and they explain the situation to Harry and his friends: Lupin is a werewolf, which led to his friends James Potter, Sirius Black, and Peter Pettigrew becoming animagi. Lupin explains that Scabbers is Pettigrew in his animal form; he has been hiding from Black, whom he had
Harry Potter and the Order of the Phoenix dormitory that was a gift from Sirius. He realises that Sirius would not want him to be depressed on the matter, and resolves to continue fighting Voldemort. "Potter" fans waited three years between the releases of the fourth and fifth books. Before the release of the fifth book, 200 million copies of the first four books had already been sold and translated into 55 languages in 200 countries. As the series was already a global phenomenon, the book forged new pre-order records, with thousands of people queuing outside book stores on 20 June 2003 to secure their copy at midnight.