This is undoubtedly the best beer book in the world. Well until the 2015 edition comes out. Lists some of the best pubs for real ale in the UK in detail covering food, opening hours, type of pub and facilities as well as beers sold. Also lists all real ale breweries in the UK and the beers they produce complete with tasting notes when these are available.
The pub information is supplied by local CAMRA groups throughout the country and of course they are only human so your favourite pub may not be in there. Also the book lasts for a year and pubs can change in that time so it is never perfect but what guide is?.