J. K. Rowling wrote Harry Potter and the Chamber of Secrets.
Harry Potter and the Chamber of Secrets is the second novel in the Harry Potter series , written by 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 .