After The City and the Stars
Revelation Space by Alastair Reynolds
If Diaspar's billion-year stasis and Alvin's rebellion ignited your hunger for cosmic-scale mystery, Reynolds unleashes that same intellectual thrill across light-years—where complacent human colonies crumble under ancient alien secrets, and curiosity-driven heroes wield relativistic physics like Clarke wielded wonder. Hard science braided with philosophical depth, no melodrama, just cerebral epiphanies among forgotten empires.