The Cassini Division

Ellen May Ngewthu is a soldier and leader of the Cassini Division, the elite defense force of the utopian Solar Union. Here in the twenty-fourth century, the forts of the Division, in orbit around Jupiter, are the front line in humanity's long standoff with the unknowable post-humans: godlike beings descended from the men and women who transformed themselves with high technology centuries ago.

The post-humans' capacities are unknown . . . but we know they disintegrated Ganymede, we know they...