This site has a lot of how too books on many subjects and I have found their books too be first rate.
In particular for vegetable gardening these two.
Seed Sowing and Saving .
The Vegetable Gardener’s Bible 
Even after 30+ years of gardening and 10 years with a greenhouse this is the book I still read in the winter getting ready and refer too all summer long.
With the new bigger greenhouse and a small coal stove this coming winter will be the first time I will try to grow food all winter long. It will be fun and probably a little painful. – D.M.