Maybe it's just because it pulls together a set of themes that happen to be dominating my mind right now, but this book feels like an absolute revelation. On one level, it's a dystopian exploration of the relationship between humanity and technology. But because the protagonist is a unique, three-dimensional character, rather than a boilerplate artificial intelligence, the novel is not a mere thought experiment in the template of "what if people had artificial friends"? It develops a deep experience at the swirling nexus of perception, belief, myth, and devotion. It seems to me that readers who found this book a little thin weren't taking seriously enough the "Sun" part of "Klara and the Sun." This isn't a book about AI. It's a book about a relationship between two entities who aren't conventionally regarded as people. Therein lies the ambition and success of Ishiguro's book.