What if, as David William Foster poses in his introduction to Brazilian author Moacyr Scliar's novel, the Germans did choose to invade the Americas in the second World War? What if the Luftwaffe did plan to bomb American cities? Wartime residents of Brazil's populous urban areas--where Scliar himself grew up in the 1940s--surely asked themselves those same questions. And immigrant Jews, clustered in the Bom Fim neighborhood of Brazil's third-largest...