Description: Orphaned children are raised on a harsh, inhospitable planet mining semi-precious stones. The planet ,Prokaryon, has an ecosystem too stuctured, too controlled , to be natural. The search for the controlling intelligence behind the environment becomes a race against the interstellar corporation that would terraform the planet. The planet's masters when revealed turn out to be one of Science Fiction's more enchanting aliens. This is loosely a series, with Brain Plague being the fourth novel to be based in the same general universe.