The Rye Baker is a cookbook that focuses on the art of baking with rye flour. Written by Stanley Ginsberg, a renowned baker, this book includes recipes for a variety of rye breads, including sourdough rye. It provides detailed instructions, historical context, and helpful tips for achieving the best results. With its emphasis on rye flour and traditional baking techniques, this book is a valuable resource for those looking to expand their sourdough repertoire.