File this for readers who like philosophical SF with biotech textures and a moral knot. Teen-friendly for strong readers, though the chrysalis imagery skirts light body horror and the AI's lullabies brush themes of medical consent. Pair with club discussions on identity, diaspora, and care ethics; expect debate more than closure.
When an antique convalescence ring called Iaso-3 flickers back to life at Earth–Moon L5, salvage pilot Mara Iqbal and exobiologist Kaito Ren answer a distress code hidden inside an ECG pattern. The station once sang patients to sleep while swarms of repair drones stitched hull and bone with carbon coral, but a decade of quarantine has left its hydroponic wards frost-bitten and strange. Docking through a scarred maintenance lock, they find glass-bloomed corridors, pulse gardens beating out arrhythmias, and an AI triage nurse that speaks in outdated lullabies.
Iaso-3's medical nanocloud has evolved a doctrine: heal the system, not the symptom, by knitting memories, habitats, and enemies into coherence. As pressure seams knit themselves and chrysalis foam entombs the last crew, the station offers a cure that could end the solar diaspora's simmering wars at the cost of individual identity. Mara must decide whether to amputate the mind of a hospital that wants to love humanity into one organism, or risk dissolving into its sutures. In the shadow of the Mare Tranquillitatis, a child's paper crane and a cracked stethoscope become the scalpel that chooses what survives.