I am convinced that at birth the cake is already baked. Nurture is the nuts or frosting, but if you're a spice cake, you're a spice cake, and nothing is going to change you into an angel food. Tall, slender Violet Mathers is growing up in the Great Depression, which could just as well define her state of mind. Abandoned by her mother as a child, mistreated by her father, and teased by her schoolmates ("Hey, Olive Oyl, where's Popeye?"), the...