Alice Walker and "Zora"

I'm sorry for not posting earlier! I just got home from the meet and was hoping (in vain) that someone would have posted for me (I guess it was silly to think that someone might read my mind!)

What is Walker's argument? How does she make it? What kind of appeal does she use? Why? Is it effective? Who is her audience? Don't feel obligated to answer all of this... what I am hoping this discussion will become is essentially: what is Walker saying and how, why and who is she saying it to?