What's the best science fiction book released in 2025?

It really depends on what you're looking for, because "best" is way too subjective. If you like harder sci-fi with complex concepts, there are several good titles that came out in 2025, but I'm not sure which one won the most awards or got the best critical reception right now. Your best bet is to check Goodreads or specialized sci-fi review sites to see the ratings and synopses - that way you can see what the community thinks and choose based on your taste.