As the book writer for one big smash and one big smelly flop, I always wondered if anyone knows just what goes into making a great musical. When a show is a hit, the critics trip over themselves not knowing who to laud and applaud the loudest. It's that marvelous score, those urbane lyrics, that irreplaceable star. But only when a show is a flop, does anyone notice the book writer. And then it's always our fault.