Opera diva Maria Callas was the epitome of the passionate Italian woman. Transforming opera's emphasis from style to substance, Callas, often called “La Divina,” cared more about bringing leading ladies to life than technical singing prowess. Her passion, in opera and in life, verged on obsession, however. She dieted relentless until she was a slim, lusted-after star, had lifelong fights with other sopranos like Renalta Tebaldi and was heartbroken until the day she died about the love of her life, Aristotle Onassis, who left her for Jackie Kennedy. Biographer Anne Edwards treats Callas with the reverence she deserves but also marks the singer with more criticism than she usually receives in her book Maria Callas: An Intimate Biography.