Jan Dalley's careful and dedicated research -- which included many interviews and conversations with the subject herself, now nearly ninety and living in France -- enables her to tell Diana Mosley's story in fascinating, and sometimes grim, detail. Growing enthusiasm for the Nazis spurred frequent visits to Germany and meetings with Hitler and other leaders (the Mosleys were actually married in Goebbels's house in 1936); there were struggles to raise money for Mosley's organization and, finally, after war was declared, years of internment in Holloway prison. Yet at the same time there were friendships with people like Winston Churchill (whose affectionate nickname for her was "Dinamite") and, after the war, a comfortable, if controversial, return to respectability.