There is a British novelist name J. K. Rowling.
Harry Potter is a British-American film series based on the Harry Potter novels by author J. K. Rowling . Harry Potter and the Deathly Hallows is the seventh and final novel of the Harry Potter series , written by British author J. K. Rowling . Joanne Rowling , ( [ ˈrəʊlɪŋ ] born 31 July 1965 ) , pen names J. K. Rowling and Robert Galbraith , is a British novelist , screenwriter and film producer best known as the author of the Harry Potter fantasy series . Since then , Rowling has written four books for adult readers : The Casual Vacancy ( 2012 ) and -- under the pseudonym Robert Galbraith -- the crime fiction novels The Cuckoo 's Calling ( 2013 ) , The Silkworm ( 2014 ) and Career of Evil ( 2015 ) .