Just came across some book titles you might want to look for on eBay or Amazon:
Seed to Seed: Seed Saving and Growing Techniques for Vegetable Gardeners by Suzanne Ashworth and Kent Whealy
Gardening When It Counts: Growing Food in Hard Times (Mother Earth News Wiser Living Series) by Steve Solomon
Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long by Eliot Coleman, Barbara Damrosch, and Kathy Bray - anything by Coleman actually
and
Secrets of Plant Propagation: Starting Your Own Flowers, Vegetables, Fruits, Berries, Shrubs, Trees, and Houseplants by Lewis Hill
And here are a few seed sites I saw listed on GIM: