In this mesmerizing portrait of the Nazi capital, Larson plumbs a far more diabolical urban cauldron than in his bestselling The Devil in the White City. He surveys Berlin, circa 1933%E2%80%931934, from the perspective of two American na%C3%AFfs: Roosevelt's ambassador to Germany, William Dodd, an academic historian and Jeffersonian liberal who hoped Nazism would de-fang itself (he urged Hitler to adopt America's milder conventions of anti-Jewish discrimination), and Dodd's daughter Martha, a sexual free spirit who loved Nazism's vigor and ebullience. At first dazzled by the glamorous world of the Nazi ruling elite, they soon started noticing signs of its true nature: the beatings meted out to Americans who failed to salute passing storm troopers; the oppressive surveillance; the incessant propaganda; the intimidation and persecution of friends; the fanaticism lurking beneath the surface charm of its officialdom. Although the narrative sometimes bogs down in Dodd's wranglings with the State Department and Martha's soap opera, Larson offers a vivid, atmospheric panorama of the Third Reich and its leaders, including murderous Nazi factional infighting, through the accretion of small crimes and petty thuggery. Photos. (May)