Seed Saving Handbook

Keith Johnson posted this at Permaculture Activist on facebook. Great information and it's free to print out the pages you are interested in saving.
http://www.howtosaveseeds.com/

Another free seed saving book (a 30 page PDF):

http://www.seedalliance.org/uploads/publications/Seed_Saving_Guide.pdf

Vegetable Seed Saving Handbook
Seed Handbook Project
Jack
http://www.howtosaveseeds.com/
Seed-Related Bibliography
http://howtosaveseeds.com/biblio.php

A Seed Saving Guide For Gardeners and Farmers
Organic Seed Alliance
30 page PDF
http://www.seedalliance.org/uploads/publications/Seed_Saving_Guide.pdf

Ute Bohnsack & Michael Miller
http://homepage.eircom.net/~merlyn/seedsaving.html
heirloom and open pollinated
http://homepage.eircom.net/~merlyn/seedsaving.html#section1
seed swap
http://homepage.eircom.net/~merlyn/seedsaving.html#section3
commercial sources: heirloom and open pollinated
http://homepage.eircom.net/~merlyn/seedsaving.html#section5
botany genetics horticulture for seedsavers
http://homepage.eircom.net/~merlyn/seedsaving.html#section2
seedsaving literature
http://homepage.eircom.net/~merlyn/seedsaving.html#section8

Seed Resources at the Permaculture Activist
http://www.permacultureactivist.net/seeds/SeedResrcs.htm