The first biography of Elaine de Kooning, 'A Generous Vision' portrays a woman whose intelligence, droll sense of humor, and generosity of spirit endeared her to friends and gave her a starring role in the close-knit world of New York artists. Her zest for adventure and freewheeling spending were as legendary as her ever-present cigarette. Flamboyant and witty in person, she was an incisive art writer who expressed maverick opinions in a deceptively...