For millennia, beer has been a staple beverage in cultures across the globe. After water and tea, it is the most popular drink in the world, and it is at the centre centre of an over $450 billion industry. With the emergence of craft brewing and homebrewing, beer is experiencing a renaissance that is expanding the reach of the beer culture even further, bringing the art of brewing into homes and widening the interest in beer as an important cultural item. The Oxford Companion to Beer is the first reference work to fully investigate the history and vast scope of beer, from the agricultural makeup of various beers to the technical elements of the brewing process, local effects of brewing on regions around the world, and social and political implications of sharing a beer. Entries not only define terms such as ''spent grain'' and ''wort'', but give fascinating details about how these and other ingredients affect a beer''s taste, texture, and popularity. Cultural entries on such topics as