Just finished this:
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This is literary S.F. It is very memorable, but not because of the S.F. elements but rather for the psychological insights. In only that way it is like
Flowers for Algernon. Klara is a "robotic companion" who is designed to be a child's companion. The story is told from Klara's point of view and I found that interesting but quite frustrating. Klara is most certainly sentient, but she is uneducated. So there is a lot going on in the world that is important to her and the story, but she does not understand it, and often assigns very wrong causality. Just for example the sun, which is part of the title she sees in a religious sense as life giving and healing. So she's both right and wrong. As the "narrator" she was a continual frustration to me, because there was so much I wanted to know, and I felt could be known, but Klara understandably, does not understand.
It's really hard to rate this book. I gave it my standard 4 stars, which in my system equates to pretty-very good. But certain people might rate it as one of the best books they've ever read and others might easily see it as a waste of time. If anyone reads this I'd be interested in their take on it as well.