"What is the "best" diet? Do calories matter? And when it comes to protein, fat, and carbs, which ones are good and which are bad? Food writer and cook Mark Bittman and health expert David Katz, MD, answer all these questions and more in a lively and easy-to-read Q&A format. Inspired by their viral hit article in Grub Street--one of New York magazine's most popular and most-shared articles--here Bittman and Katz share their clear, no-nonsense perspective...