To write a cookbook, a good author will go to great lengths to perfect a recipe or understand a cuisine. On this week's show, we meet four food writers who are driven by a deep culinary curiosity. You may know Melissa Clark from her weekly column in the New York Times food section or from one of her 45-odd published cookbooks. Melissa joins us, as does Vicky Bennison, the creator of the YouTube sensation, Pasta Grannies.

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