LONNEKE GEERLINGS opens her biography of Rosey E. Pool, I Lay This Body Down, by depicting her subject getting off a cattle car destined for Auschwitz. Convincing the authorities that she was a guard who had lost her identifying armband, combined with her fluent German, served to win her a temporary reprieve. In any event, this quick-witted evasion both saved her life and forever marked her with survivor’s guilt.