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 fandom fans had grown so large that considerable security measures were taken to ensure that no book was purchased before the official release date. "Harry Potter" is considered one of the few four-quadrant, multi-generation spanning franchises that exist today, despite Rowling's original marketing of the books to tweens and teens. Pottermania is an informal term first used around 1999 describing the craze "Harry Potter" fans have had over the series. Fans held midnight parties to celebrate the release of the final four books at bookstores which stayed open on the night leading into the date of the release. In 2005, "Entertainment