The history of Lager - importing, brewing and drinking it - from the pioneers of 1830's to the 1970's boom. Charted in the charts and numbers you'd expect, but with plenty of footnotes, too.
Because the properly-written history was just 40 pages, I've filled out the book with lots of the source material I used to write the proper history bit mixed with my ramblings and interpretations.
It's more fun than it sounds.