Book excerpt: Everyone loves potatoes. This book transports cooks beyond the usual side dishes and introduces them to the secrets and specialties of great chefs and cooks the world over. Finamore shows how to prepare spectacularly simple appetizers, including dips, chips, and showstopping cocktail potatoes made from a few ordinary ingredients. He presents dozens of soups and salads, including rich Summer Vichyssoise and Herb Garden Potato Salad. There are more than fifty main-dish possibilities, suchas Sunday Lamb with Proper Roast Potatoes and Chicken Stuffed with Potatoes and Shiitake Mushrooms -- not to mention a sophisticated rendition of Shepherd's Pie. The potato turns up as the hidden ingredient in such breads as Potato Cheddar Bread with Chives and in such desserts as moist Farmhouse Chocolate Cake. Finamore shows how to master crisp steak fries, silky mashes, and sumptuous gratins. A bonus feature of the book is the sweet potato, in dishes from a delightfully nostalgic Baked Sweet Potatoes with Marshmallow to an urbane Semifreddo with Chocolate Sauce.