1. History and Social Aspects of Sourdough -- 2. The sourdough legislation -- 3. Chemistry of Cereal Grains -- 4. Technology of Sourdough Fermentation and Sourdough Applications -- 5. Steamed Bread -- 6. Taxonomy and Biodiversity of Sourdough Lactic Acid Bacteria -- 7. Taxonomy, Biodiversity and Physiology of Sourdough Yeasts -- 8. Physiology and Biochemistry of Lactic Acid Bacteria -- 9. Sourdough: A Tool to Improve Bread Flavor, Rheology and Shelf Life -- 10. Sourdough: A Tool for Non-Conventional Fermentation and To Recover Side Streams -- 11. Nutritional Aspects of Cereal Fermentation with Lactic Acid Bacteria and Yeasts -- 12. Sourdough and Gluten-Free Products -- 13. Sourdough and Cereal Beverages -- 14. Perspectives.