The Perfect Loaf, by Maurizio Leo

Maurizio Leo's The Perfect Loaf blog is one of the most trusted sourdough resources on the internet. This cookbook is the full version of that work – the techniques, the troubleshooting and the teaching style that made the blog a joy to follow. 

Leo covers sourdough from the ground up. Beginners get troubleshooting guides and step-by-step instruction. More experienced bakers get the science behind fermentation, hydration ratios and freshly milled grains. It's the kind of book that earns a permanent spot on the counter.