J.K. Rowling is the author of the Harry Potter series. The series, consisting of seven books, follows the journey of a young wizard, Harry Potter, and his friends Hermione Granger and Ron Weasley as they confront the dark wizard Voldemort. The books have gained immense popularity, translating the struggles of adolescence and the fight between good and evil into a magical world. Rowling's writing not only created an extensive universe but also culminated in films, plays, and numerous merchandise, making Harry Potter a significant cultural phenomenon.