When her son's teacher suggests the boy be tested for ADHD, Kim Livingston, uninformed and wary of the label, fights her. She fights the social worker, the doctor. "We can call it whatever you like," the doctor says. "But if he walks like a duck and talks like a duck, they're all going to know he's a duck." This English professor grew up spacey and overweight. Drowning in the unrealistic demands of motherhood, Livingston steals her son's ADHD medication...