Adapted by Robert David MacDonald from Gitta Sereny's Into That Darkness'Robert David MacDonald's In Quest of Conscience, based on Gitta Sereny's Into That Darkness, a record of her interviews with death camp commandant Franz Stangl, takes it for granted that the Holocaust was a shocking crime against humanity; what it wants to know, with an urgency amounting to desperation, is how it happened, and how it can be prevented from happening again.' - Joyce Macmillan, Scotland on Sunday'stangl. bur