Exodus: The Helium Sea

Exodus: The Helium Sea closes out Peter F. Hamilton's Archimedes Engine duology. The Crown Dominion has kept an uneasy peace for millennia, the Celestials firmly in charge and the human population treated as little more than serfs, but that balance breaks when a faction exiled across the Helium Sea seven thousand years ago returns to settle old scores.

Finn and his human allies are pulled toward the center of the conflict, some by choice and others by manipulation they don't fully see until too late. It gives them an unprecedented opening: if they can hold their alliance together, they might finally secure their people real independence within the Crown Dominion rather than continued subjugation.

The novel unfolds over roughly a decade, following separate missions and factions that Hamilton brings together for a single convergence, resolving the mysteries and costs set up across the duology.