Barbara Graham might have been a diabolical dame in a hard-boiled detective story-beautiful, sexy, and deadly. Charged alongside two male friends in the murder of an elderly widow during a botched robbery attempt, "Bloody Babs" became the third woman executed in California-after a 1953 trial that played out before standing-room-only crowds captured the imaginations of journalists, filmmakers, and death penalty opponents. Why, Kathleen A. Cairns asks,...