"Harry Potter fandom" refers to the community of fans of the Harry Potter books and movies who participate in entertainment activities that revolve around the series, such as reading and writing fan fiction, creating and soliciting fan art, engaging in role-playing games, socializing on Harry Potter-based forums, and more.
The fandom interacts online as well as offline through activities such as fan conventions, tours of iconic landmarks relevant to the books and production of the films, and parties held for the midnight release of each book and film.
By the fourth Harry Potter book, the legions of fans had grown so large that considerable security measures were taken to ensure that no book was purchased before the official release date.
The craze over the series was referenced in Lauren Weisberger's 2003 novel The Devil Wears Prada as well as its 2006 film adaptation.
In the story, the protagonist Andrea Sachs is ordered to retrieve two copies of the next installment in the series for her boss's twins before they are published so that they can be privately flown to France, where the twins and their mother are on holiday.The series has come with its share of criticism as well.