Book excerpt: This book tells the story of how this beloved food became the apple of our collective eye-or, perhaps more precisely, the pepperoni of our pie. Pizza journalist Liz Barrett explores how it is that pizza came to and conquered North America and how it evolved into different forms across the continent. Each chapter investigates a different pie: Chicago's famous deep-dish, New Haven's white clam pie, California's health-conscious varieties, New York's Sicilian and Neapolitan, the various styles that have emerged in the Midwest, and many others. The components of each pie-crust, sauce, spices, and much more-are dissected and celebrated, and recipes from top pizzerias provide readers with the opportunity to make and sample the pies themselves.