I've just got the Book of Pubmanship by Ronnie Corbett.
I'm not really a fan of Corbett's cabaret club-style light entertainment sketches or the golf club anecdotes and I probably wouldn't have bought the book if I hadn't read a copy at a mate's house and then spotted it second hand on Amazon for a penny.
The Book of Pubmanship was published in 1972 and sponsored by Imperial Tobacco (you read that right, a book about pubs sponsored by a tobacco company). The book deals with all the important questions: how to pick a pub, whose round is it and what to do about a hangover. Although Corbett is a spirits drinker, there's lots of interesting stuff about beer too: beer styles, beer consumption between 1960 and 1970 and beer glasses.