She could file a small claims case, which would get the matter resolved in two months or so. At the very least she would get a refund for all the books she purchased. There is probably an arbitration clause somewhere in the shrinkwrap which would be to her benefit because it would be easier to handle everything by mail and she doesn't need a lawyer. I am sure there are loads of attorneys in Seattle who would be happy to take a small claims case for $500.