Eva Walker is a seventeen-year-old math genius. And if that doesn't do wonders for her popularity, there's another thing that makes it even worse: when she touches another person or anything that belongs to them --- from clothes to textbooks to cell phones --- she sees a vision of their emotions. She can read a person's fears and anxieties, their secrets and loves ... and what they have yet to learn about calculus. This is helpful for her work as...