There are a few other books in that universe, 3 in that story line by Bedford, Brin, then Bear. Another series in the world, Caliban by Roger McBride Allen
My son printed one that is more funnel shaped to keep from losing any of the precious grounds.
There are a few other books in that universe, 3 in that story line by Bedford, Brin, then Bear. Another series in the world, Caliban by Roger McBride Allen