Kingdom of Cages

Humanity's off-world colonies, the Called, were dying. Planets and peoples had been ravaged by the Diversity Crisis of environmental collapses and mutating diseases. All except Pandora, a thousand-year old biogenetics research outpost, where respect for the ecosystem had become a fanatic religion and a small, genetically controlled population lived in self-sufficient city-domes. Peaceful, benign, and smug in their isolation, the Pandorans lovingly tended their lush, perfect world - until the day an ad-hoc starfleet arrived with an ultimatum: The Pandorans must use their genius to solve the Crisis, or the Called will destroy their cities and let hordes of starving, desperate refugees overrun Paradise.
Ten years later two young girls, Chena and Teal Trust, and their mother, Helice, come to start a new life on Pandora, whose "hothouse" scientists have allowed a select few to live in guarded planetside villages. But for Chena and Teal, Utopia quickly turns into Hell.
The threatened, resentful hot-housers treat the refugees with paranoid contempt - as violent, savage, raw DNA for involuntary experiments. And there is something in the Trusts' genome that the Pandorans want badly. Badly enough to kill for.
Now two innocent children are fugitives in a closed system. They can neither retreat to space nor escape into a wilderness where Nature has been programmed to destroy intruders. To survive, Chena and Teal must discover why their bodies are needed by a conspiracy called the "Eden Project." For the Crisis has become an apocalypse, the colonists are about to invade, and although the Pandorans insist the Eden Project will save all humanity, there may be a more final solution.