I always wondered if the book had anything to do the Guinness beer. As it turns out, it has everything to do with the beer company!
Sir Hugh Beaver, the managing director of Guinness Breweries, was out hunting and got involved in a debate about what the fastest game bird in Europe was.
Realizing that such questions are probably asked in pubs around the country, Sir Beaver commissioned a fact finding company to publish a book of facts, giving birth to the "Guinness Book of Records."
It was supposed to be a one-time marketing campaign, but the book gained immense popularity and eventually led to an annual publication that we see today.