Harry Potter is a heptalogy of fantasy novels written by British author J. K. Rowling. The books chronicle the adventures of the eponymous adolescent wizard Harry Potter, together with Ron Weasley and Hermione Granger, his best friends. The central story arc concerns Harry's struggle against the evil wizard Lord Voldemort, who killed Harry's parents in his quest to conquer the wizarding world, after which he seeks to subjugate the Muggle (non-magical) world to his rule.