IT WAS THE ANSWER TO A MILLION PRAYERS... It was the miracle everyone had waited for: Sovwren--incredibly nutritious, indescribably delicious. Millions of Americans went for it, lived on it, lost weight on it--became the slim, lithe creatures of their most glamorous dreams. They tasted happiness...until an appetite for something more began to stir. Small at first, it grew and became a hunger nothing could satisfy. And then they were swept...