I recommend "Tartine Bread" as a supplement to that, specifically for making breads with wild yeast. The method in Flour Water Salt Yeast for starting and maint

I recommend "Tartine Bread" as a supplement to that, specifically for making breads with wild yeast. The method in Flour Water Salt Yeast for starting and maintaining the culture seemed really finicky and intimidating when I first skimmed it. Reading the Tartine Bread book both gave me a better understanding of how it works, and is also a lot more relaxed about the process. Flour Water Salt Yeast is better for general breadmaking technique though.