Ever since 1759, when Voltaire wrote "Candide" in ridicule of the notion that this is the best of all possible worlds, this world has been a gayer place for readers. Voltaire wrote it in three days, and five or six generations have found that its laughter does not grow old. "Candide" has not aged. Yet how different the book would have looked if Voltaire had written it a hundred and fifty years later than 1759. It would have been, among other things, a book of sights and sounds.