Gluten-Free Sourdough Baking: The Miracle Method for Creating Great Bread Without Wheat by Mary Thompson is a cookbook for gluten-free individuals. It provides guidance on cultivating a gluten-free starter, using specific flours like brown rice and tapioca, and offers recipes for various baked goods, including vegan and allergen-friendly options. The book aims to make delicious, crusty sourdough accessible for those with celiac disease or gluten intolerance.