On the subject of pizza, there is never a shortage of opinions. Allegiances run from the general (Chicago versus New York style, Neapolitan versus Roman) to the particular (Pepe's versus Sally's, Gino's East versus Pizzeria Uno), and new interpretations ever extend the pizza frontier.In AMERICAN PIE, master bread baker Peter Reinhart follows the trail from Italy to the States, capturing the stories behind the greatest artisanal pizzas of the Old World and the New. Beginning his journey in Genoa, Reinhart scours the countryside in search of the fabled focaccia col formaggio. He next heads to...