Happy birthday to J. K. Rowling, the British novelist best known as the author of the Harry Potter fantasy series. Our Collector's Treasure of the Day is this copy of Harry Potter and the Goblet of Fire which has been hand-signed on the title page by the notoriously reluctant signer. The Harry Potter series has sold more than 400 million copies to become the best-selling book series in history and been the basis for a popular series of films. First Book Club Edition. Provenance Heritage Auctions. Fine condition. Authenticity guaranteed for life by Collector's Shangri-La.