Seedborn

The orbital Diadem is dying—its air thinning, its recycled biosphere starving for trace elements only found on a planet humanity abandoned four centuries ago. Xenobiologist Anjali Sorel joins a desperate descent expedition to Earth's surface, now consumed by the Bloom, a continent-spanning nano-organism that devours anything it doesn't recognize. What the team discovers in the alien forests below shatters every assumption: survivors, symbiosis, and a secret that could either unite two lost branches of humanity or ignite a war that exterminates them both.