I also enjoy baking and making my own sourdough starter. I have learned so much from the following books on bread/sourdough.
Classic Sourdoughs A Home Bakers Handbook-by Ed Wood
Peter Reinhart's Artisan Breads Every Day: 50 Fast and Easy Recipes for World-Class Breads
My Bread: The Revolutionary No-Work, No-Knead Method-by: Lahey, Jim
Tartine Bread by: Robertson, Chad
Bread:A Baker's Book Of Techniques And Recipes by: Hamelman, Jeffrey
Crust: Bread to Get Your Teeth Into (With DVD) by: Bertinet, Richard
Best place to buy : http://www.ecookbooks.com/
I have made a starter out of over ripe mission figs