 His 19-year-old son , nicknamed "Baby Doc", succeeded him as president.Many books have been written about the Francois Duvalier era in Haiti, the best known of which is Graham Greene's novel "The Comedians".Duvalier, however, dismissed the piece and referred to its author as "a cretin, a stool pigeon, sadistic, unbalanced, perverted, a perfect , lying to his heart's content, the shame of proud and noble England, a spy, a drug addict, and a torturer".