A colony of human freedom fighters, ex-slaves of the mysterious and ruthless Eosi, have now gathered strength enough to use the resources of the Botany colony to attempt the liberation of Earth itself from the Eosi grasp.
Lots of thoughtful detail as Kris Bjornsen, her lover the fugitive Catteni warrior Zainal, and the rest of the human leadership grapple with the logistical, tactical, and management challenges involved with mounting an invasion against a powerful alien foe and resupplying the surviving humans starving on an Earth stripped of its natural resources.
The creative story of forced colonization (on a world possibly already occupied/owned by another intelligent alien race) continues in this volume. I'm not sure, but I think there's a fourth book in the series, which I don't have.
Wow.Wow. Wow. A fitting end to the trilogy. The concept of another world that could sustain human and other life forms, develop a new society, and rescue a world, is amazing. And, the idea that there is a much higher cognitive life form that can assist many other life forms-just amazing. Read it, read it, read it!!!