Book excerpt: "Cookery and Dining in Imperial Rome" by Apicius is the oldest known cookbook in existence. There are recipes for cooking fish and seafood, game, chicken, pork, veal, and other domesticated animals and birds, for vegetable dishes, grains, beverages, and sauces; virtually the full range of cookery is covered. There are also methods for preserving food and revitalizing them in ways that are surprisingly still relevant.