Harry Potter fans are in a tizzy over speculation that J.K. Rowling, who has always maintained that her best-selling series would end with the seventh book, may do an eighth volume. According to the Scotsman newspaper, Warner Bros. has registered three more Harry Potter titles as trademarks at the UK Patent Office: Harry Potter and the Alchemist's Cell, Harry Potter and the Chariots of Light and Harry Potter and the Pyramids of Furmat. However, Rowling is reportedly near completing the long-awaited fifth installment, titled Harry Potter and the Order of the Phoenix. So that leaves two scenarios: Either Phoenix will be renamed when it hits the big screen, or Rowling is secretly plotting an eighth book.