At which point, I'd expect it to be a matter for the author to take it to court as opposed to expecting a bookstore to adjudicate it for them. Which is (sadly) going to be expensive for an individual unless a publisher is going to undertake the effort for them.
I don't think she's asking Amazon to remove the books (though they should), but rather they're on her author page. There should be a way for an author that you've created a page for to be able to say "those books aren't mine, please remove them."
