Oleh chris.zurhorst, This is a recipe from King Arthur Flour. It comes with the sourdough starter that can be ordered from them as well as finding it online in their website. It is a very good base recipe for making sourdough breads. Maintaining a proper sourdough starter is definitely a commitment. If you keep starter out at room temperature you will have to feed it every day. If you keep it refrigerated like I do, you will only have to feed it once a week to maintain it however you have to remove from fridge and feed it at least 8 to 12 hours before you want to make bread with it. And with both ways; always feed after use. Making a starter from scratch takes a lot of time before you can use for first time. I suggest getting a few ounces of a established starter from someone who has one already or order it from King Arthur Flour. Sourdoughs have different flavors depending on where you live. The sourdough bread I make in New York will taste different than a sourdough made in San Francisco.