Being rather new to this group, I haven't been able to read all back posts, so don't know if this book has been recommended or discussed.
I got it last winter and have found it invaluable. It is absolutely loaded with info and charts and all sorts of good gardening facts.
Main focus is on bio-intensive gardening.
"How to Grow More Vegetables" * than you ever thought possible on less land than you can imagine. (Yeah, long title)
By John Jeavons.
Hope this helps someone.