For recipes, more recipes, know how and sourdough techniques see here: http://amzn.to/QHDROG (shameless plug for my books).
For PDF format see here: Discovering Sourdough
Flaxseed is a wonderful addition to bread. I toast mine and then pour water over it while it is still jumping in the pan like a Mexican jumping bean. This will bring out the mucilaginous property of the seeds and help produce moist, flavorful bread that stays fresh longer.