The crystalline intelligences have stopped watching. They are rewriting Earth's technology at the molecular level, and humanity has weeks before its infrastructure belongs to something else entirely.
The plasma beings offer permanent partnership — shared consciousness, shared defense — but the cost is absolute. Twelve volunteers step forward to host alien minds inside their own, carrying wedding rings and children's drawings as anchors to who they were before. Lieutenant Dez Roanhorse goes first, because someone always has to.
Then the story leaps forward ten years. In Ames, Iowa, 2,000 people gather at a restored elementary school. In Geneva, a woman reads the names of those who did not survive. A plasma entity says thank you in every frequency it knows. A father carries a crayon drawing his daughter made when she was four. The aurora pulses above the Alps. And someone goes downstairs to start the second decade.
The Alliance is the final book of the Sunstrike series — a story about what it costs to share your mind with another species, and what humanity builds in the decade after everything changes.
Book 3 of the Sunstrike series. 35 chapters. 104,000 words.