<P> Fans of the series were so eager for the latest instalment that bookstores around the world began holding events to coincide with the midnight release of the books, beginning with the 2000 publication of Harry Potter and the Goblet of Fire . The events, commonly featuring mock sorting, games, face painting, and other live entertainment have achieved popularity with Potter fans and have been highly successful in attracting fans and selling books with nearly nine million of the 10.8 million initial print copies of Harry Potter and the Half - Blood Prince sold in the first 24 hours . </P> <P> The final book in the series, Harry Potter and the Deathly Hallows became the fastest selling book in history, moving 11 million units in the first twenty - four hours of release . The series has also gathered adult fans, leading to the release of two editions of each Harry Potter book, identical in text but with one edition's cover artwork aimed at children and the other aimed at adults . Besides meeting online through blogs, podcasts, and fansites, Harry Potter super-fans can also meet at Harry Potter symposia . </P> <P> The word Muggle has spread beyond its Harry Potter origins, becoming one of few pop culture words to land in the Oxford English Dictionary . The Harry Potter fandom has embraced podcasts as a regular, often weekly, insight to the latest discussion in the fandom . Both MuggleCast and PotterCast have reached the top spot of iTunes podcast rankings and have been polled one of the top 50 favourite podcasts . </P> <P> Some lessons identified in the series include diversity, acceptance, political tolerance, and equality . Surveys of over 1,000 college students in the United States show that those who read the books were significantly different than those who had not . Readers of the series were found to be more tolerant, more opposed to violence and torture, less authoritarian, and less cynical . Although it is not known if this is a cause - and - effect relationship, there is a clear correlation, and it seems that Harry Potter's cultural impact may be stronger than just a fandom bond . </P>

How many chapters are in all the harry potter books