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
Religious debates over the Harry Potter series number of Wiccans and other commenters have argued that the critics' definition of Wicca tends to lump together many and various spiritualist practices that actually have little in common. They have also highlighted the differences between magic within Wicca, which is invocational and derives from the divine powers, and that depicted by the "Harry Potter" books, which is a purely mechanical application of spells without invoking any deities. A Wiccan review of "Harry Potter: Witchcraft Repackaged" pointed out that "communing with the dead and spirit world, sorcery, curses, occult symbology, black magic [and] demon possession"—all cited by the book as