Making Super Sourdough is the true test of every aspiring bread-maker. Fickle and delicate, every loaf is unique. And there are a lot of pitfalls to be avoided. It's much more than a food: sourdough is a science. Who better than Dr James Morton, baking pedant and fermentation fanatic, to explain the basics for both the uninitiated, and more experienced bakers? James talks the home baker through everything from starters, flours and hydration,...