this excellent book gives infomation on how to save pure seed from just about any plant you could wish to grow (and probubly some you will never have heard of), published by the american seed saving sosciety, it is well written and laid out, possibly a little too abvaced for the absolute beginner but a good investemt nont the less.
written using some american veriety names eg. frnch beans called common beans, and with seasonal sowing information that is probubly relevent to america only. but none the less very well rounded and compiled.
highly recommended