Science fiction did not just entertain in 2025, it took the temperature of the world and reported back in story form. From climate futures and algorithmic surveillance to cyborg bodies, memory control, and first-contact xenobiology, these novels are the year’s sharpest, strangest, and most unforgettable reads. Here’s Demagaga’s curated guide to the sci-fi books that felt truly alive, and why each one belongs on your radar.