J.K. Rowling (Author) J.K. Rowling is the author of the enduringly popular, era-defining Harry Potter book series, as well as several stand-alone novels and a crime fiction series written under the pen name Robert Galbraith.After the idea for Harry Potter came to her on a delayed train journey in 1990, she plotted out and wrote the series of seven books and the first, Harry Potter and the Philoso...