I really loved this book--raced through it because I'd gotten so invested in the fate of Klara. That's Ishiguro's magic--he can bring to life an Artificial Friend, an android companion and make us care about her--more, indeed, than we care about the sick girl she is companion to.
The story is told by Klara and it's a fascinating exercise in imaging how an artificial intelligence would see and react to the world--a world not far removed from our present day, no flying cars or transporters but much like today: a world still full of inequality, a world in which love is fickle. Highly recommended.
(I haven't read Ishiguro's Never Let Me Go which is about human clones but now I'm eager to.)