With her new novel, So Much for That, Lionel Shriver strengthens her already credible claim to the title of best living American writer. This won't surprise her readers in the UK and much of Europe. In many countries, she is now regarded as one of our most important novelists. Americans, however, have been slower to find her. That's okay. We were the same way with Faulkner and Poe. Nothing's more American than not quite recognizing some of our most accomplished artists.