Primo Levi, the Italian-born chemist once described by Philip Roth as that "quicksilver little woodland creature enlivened by the forest's most astute intelligence," has largely been considered a heroic figure in the annals of twentieth-century literature for If This Is a Man, his haunting account of Auschwitz. Yet Levi's body of work extends considerably beyond his experience as a survivor. Now, the transformation of Levi from Holocaust memoirist...