As chefs of two of the world’s most influential, risk-taking restaurants, Grant Achatz and Heston Blumenthal are often compared to one another. Now, it turns out, Achatz’s Alinea Book and Blumenthal’s Big Fat Duck Cookbook are scheduled for release within a week of each other this fall—and they have taken very similar approaches to translating their cuisines into print. Gourmet’s Christy Harrison spoke with the chefs about the writing process, the audiences they hope to reach with their books, and their feelings about the term “molecular gastronomy.”