LONDON (Reuters) - Queen Elizabeth is throwing a star-studded party for him at Buckingham Palace and in Buenos Aires, leading cultural figures will gather in an old orphanage to read from his works. Charles Dickens may have died in 1870, but legions of fans around the world unite next Tuesday and beyond to celebrate the 200th anniversary of the birth of a titan of English fiction. In one sense, the story of the author of familiar classics like "A Christmas Carol," "Bleak House" and "A Tale of Two Cities" is thoroughly modern. ...