Tammie's Reviews > Seed to Seed: Seed Saving and Growing Techniques for Vegetable Gardeners

This has to be one of the best resources out there for seed knowledge. I wanted something that would tell me the basics, give me extra tips and diiferentiate enough between different types of plants so as to keep me informed, but not overwhelm me with too much material. This is it.
Each sections narrows down the plants to specific type with great pictures too. There is plenty of information good and bad about collecting and harvesting, many things I hadn't thought of that not knowing would've been too little too late in practice to find out on my own.
If you are serious about seed harvesting or plan on starting any sort of seed exchange group, I highly recommend taking a look at this book.