Which book is this?

Sourdough (2017) · Robin Sloan Songs of a sourdough (1907) · Robert W. Service Rita Davenport's Sourdough cookery (1977) · Rita Davenport Sourdough Cookery (1977) · Rita Davenport Creative sourdough cooking (1977) · Rose Cantrell Classic sourdoughs (2001) · Ed Wood Adventures in sourdough cooking & baking (1971) · Charles D. Wilford The Sourdough Wars (1984) · Julie Smith Baking sourdough bread (2014) · Göran Söderin Sourdough (2015) · Sarah Owens