Book excerpt: Understand the science that goes into making your favorite beverage. This crash course in brewing chemistry makes it easy for every homebrewer to make better beer. Using simple language and helpful diagrams, Lee W. Janson guides you through every chemical reaction in the brewing process and explains how you can avoid potential problems. Steer away from common mistakes in taste, fermentation, and alcohol content, and use your newfound knowledge to successfully brew your most delicious beer yet.