J.k rowling is a british writer. She wrote a couple book series, but her most popular book series was the Harry Potter series.
The first book she wrote on this series was the philosopher’s stone a.k.a scorcers stone. Followed up by the chamber of secrets then escape from Azkaban followed with Harry potter and the goblet of fire.
Harry potter and the order of the phoniex was next along with harry potter and the deathly hallows.
The longest movie/book was the order of the phoenix. Harry potter and the order of the phoenix was the main uprising of the entire book series.
This specific book was the one that really made an impact on the entire series. This book was perhaps my favorite book out of all of the books that jk rowling has made.