In her bestselling food industry exposés What to Eat and Food Politics, Marion Nestle taught the nation how to shop smarter at the supermarket. Now the New York University nutrition professor has teamed with animal nutrition expert Malden C. Nesheim to examine the $18 billion pet food industry in Feed Your Pet Right: The Authoritative Guide to Feeding Your Dog and Cat (Simon & Schuster, $16.99). Their research-based work examines the politics, marketing and science behind pet food, and offers pet owners advice on how best to feed America's 172 million cats and dogs.