Cixin Liu's The Three-Body Problem isn't a breezy space opera with laser blasters and quippy heroes. It's a massive, cerebral hard sci-fi epic that begins in the violent purges of China's Cultural Revolution and expands into an existential cosmic chess match.

If your high schooler loves deep physics, big philosophical questions, and intricate mysteries, this is absolute gold. Just know that the pacing is dense, the characters can feel clinical, and the overall mood is heavy with despair and suicide. It rewards patient readers who want a book that makes them think for weeks after closing the back cover.