I belong to koanga gardens ( www.koanga.org.nz
) which is the heirloom seeds trust over here. We're in New zealand so I doubt that would be any help to you. However, they recommend a book called Seed to seed by Suzanne Ashworth which they say is the best book they've ever seen for seed savers. I save my seeds in a haphazard way but so far I've managed to get second year pumpkins & cucumbers. I also save seeds out of especially nice organic veges I buy.