The very first winemaking book I read was The Joy of Home Winemaking by Terry Garey. I was on a business trip, killing some time by browsing thru Barnes & Noble, and picked it up just on impulse. It's still on my bookshelf and I still refer to it occasionally. Since then I've become a casual collector of old and/or odd books about winemaking... such as Successful Wine Making at Home by H.e. Bravery. There were quite a few small books/pamphlets on the subject published in the 1950's-1960's, especially in the UK, and I come across one from time to time; always interesting, even if technique and technology have moved on.
For up-to-date info, I tend to search the net and post to forums like this one.