Omnivore's Dilemma: A Natural History of Four Meals is a non-fiction book by Michael Pollan. It basically talks about food and tries to answer what food we should be eating for dinner. Test what you can remember of chapter 9.
Eat food that grows close to the ground.
Eat the corn directly instead of eating the corn after it has been fed to other animals.
Eat food that has been processed.
Here's an interesting quiz for you.