The setup
Klara is an AF, an Artificial Friend, a solar-powered companion robot sold to families with lonely children. When the book opens she's standing in a store, studying the street through the window and noticing everything: how passersby move, how people hide what they feel, and above all the Sun, which she speaks of as a living, generous being who restores her when she's low.
Eventually a teenage girl named Josie chooses her and takes her home. Josie is sick with an illness the book circles but never fully explains, and her household is tense: a mother who watches Josie too closely, a housekeeper who distrusts Klara on sight, a father somewhere offstage, and Rick, the boy next door, who is Josie's oldest friend and who hasn't been given the expensive advantages the other children have. Klara's job is to keep Josie company. She takes it to mean something much bigger.
Ishiguro won the Nobel Prize in Literature in 2017, and this was his first novel after it. If you know his earlier work, you'll recognize the territory at once: a narrator with a limited view, a world with something quietly wrong at its center, and a question about what makes a person a person.
What it does well
Klara's voice is a genuine achievement. She's observant and literal, kind and slightly off. Her descriptions of rooms breaking into boxes when she's overwhelmed, or of the Sun's "nourishment," give you the world through an intelligence that isn't human, and the gap between what she sees and what you understand is where the book does its work. It's often funny, too, in a gentle way, because Klara takes everything at face value, including the odd things people say to be polite.
The novel is also about parents and children more than it is about robots. Josie's mother is one of Ishiguro's best characters: desperate, controlling and frightened, making choices you will argue with long after you close the book. Klara's devotion to Josie puts the human adults' love under a harsh light, and it isn't always flattering.
Ishiguro keeps the science fiction in the background. There are hints about the society around the family, about which children get ahead and which don't, and about what work has become, and he trusts you to put them together. If you like books that leave room for you to think, this is generous.
Where it wobbles
The flatness of Klara's voice is a deliberate choice, and it will not be to everyone's taste. Sentences can feel stiff and repetitive, and the pace is slow, especially in the opening store chapters. Readers who want the world explained will be frustrated; there's a lot the book simply declines to tell you.
Some of the plot turns in the second half rest on Klara's private beliefs about the Sun, and how you feel about that thread decides how you feel about the book. We found it moving, a kind of faith seen from outside. A friend found it so odd she nearly stopped reading. We also wanted more of Rick, who carries the book's sharpest ideas about class and gets fewer pages than he deserves.
How it reads now
When the book came out in 2021, artificial intelligence was mostly a background worry. Now that many people talk to chatbots every day, Klara reads differently. Her patient attention and her very human hopes feel less like a fable and more like a mirror. Ishiguro doesn't take a side on whether Klara has an inner life, and that refusal has aged well.
The verdict
Klara and the Sun is a quiet, strange, deeply humane novel. It isn't Ishiguro's best (Never Let Me Go is right there), but it's a beautiful companion to it, and Klara is a narrator you'll think about for a long time. Read it slowly, ideally near a sunny window, and be prepared to feel unexpectedly protective of a machine.