If you're a girl, you should strive to look like the model on the cover of a magazine. If you're a boy, you should play sports and be good at them. If you're smart, you should immediately go to college after high school, and get a job that makes you rich. Above all, be normal.Right? Wrong, say 35 leading middle grade and young adult authors. Growing up is challenging enough; it doesn't have to be complicated by convoluted, outdated,...