Elizabeth Blackwell believed from an early age that she was destined for a mission beyond the scope of "ordinary" womanhood. Though the world at first recoiled at the notion of a woman studying medicine, her intelligence and intensity ultimately won her the acceptance of the male medical establishment. In 1849, she became the first woman in America to receive an M.D. She was soon joined in her iconic achievement by her younger sister, Emily, who was actually the more brilliant physician. Exploring the sisters’ allies, enemies and enduring partnership, Janice P. Nimura presents a story of trial and triumph.