that sounds like a good idea.
The Women's Room by Marilyn French would be a good place to start.
I know that Andrea Dworkin wrote some fiction but know nothing about it.
Virginia Woolf...
Historical fiction would be good too, to discuss how things have changed (0r not) over time.
The Bell Jar by Sylvia Plath.
Margaret Atwood...
As for classics I'd suggest Anna Karenina, Moll Flanders, Madame Bovary.
Are Toni Morrison's novels feminist. I've heard of her but not sure if it's suitable.
Alice Walker...
I think there should be a range of places/ times/ themes etc.
The yellow Wallpaper by Charlotte Perkins Gilman.
oranges are not the only fruit by Jeanette Winterspoon- I've not read the book but saw the tv series repeated recently.
Although it doesn't have to be all serious. Doing a chick lit book would make the discussion more accessible to a wider audience.