I read this book at the same time as I was reading "The Remains of the Day," also by Kazuo Ishiguro. Both books tell the story of a servant, in this case the servant is artificial friend who will sacrifice herself for her human friend... at least that's how it appears to me. In "The Remains of the Day" the servant is an English Butler. Both books end with the servant reflecting back on his and her life; ironically, the artificial friend has an easier and more meaningful end than does the butler. I loved both books, really.