The fate of fictional boy wizard Harry Potter will finally be revealed on July 21, the publication day for the seventh and final installment of J.K. Rowling's hugely successful book series. In what promises to be one of the biggest publishing events in recent years, book stores will be bracing for another outbreak of Pottermania as fans across the world snap up their copies of Harry Potter and the Deathly Hallows. Speculation has been rife that Rowling, who became a dollar billionaire on the back of the success of the Harry Potter books and spin-off movies, may kill Harry at the end of book seven. She said last year that at least two characters would die in the final book, and that she understood authors? desire to kill off the main character of a successful series. Two top US authors, John Irving and Stephen King, were sufficiently concerned over the fictional hero?s fate to urge Rowling to spare Potter. Potter publisher Bloomsbury Publishing Plc announced the release date recently, and added that it remained cautious about its outlook in light of challenging market conditions, although the announcement supported its previously stated view of a satisfactory outcome for 2007.