Rigg and his group of friends continue to be manipulated by humanoid mice, Expendables (robots), Ram Odin, and many other people as they try to race to save the planet Garden from the “Visitors”. While they initially think that the Visitors are from Earth, who initially sent the colony out, they are mistaken and then Rigg (or a clone of Rigg) must save both Earth and Garden from a marauding space civilization that is determined to not live in peace with humans.
Like book 2, continuity errors from the first novel abound and detract from overall enjoyment of the story. There is more new interesting pieces being put together so the issues are less problematic, but they’re still there. I’ve read this a few times, so I recommend it, but with that caveat.