Harry Potter author Jk Rowling is keeping the outcome of the final book in the series secret, but has teased fans by revealing the last ever word she'll write. Rumours have been circulating over the fate of the main character Harry - played in the box office hit movie by teen actor Daniel Radcliffe. But Rowling will only reveal "scar" will be the final word in the seventh and final Harry Potter novel - she's keeping the title and release date a firm secret.