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Yet another exciting adventure of Pancho, Kris, Wannamaker, Holly (Suzie) and the rest of the gang from the habitat Goddard. The Grand Tour continues to the orbit of Saturn. The habitat seems to be right out of the space settlement concept proposed by American physicist Gerard K. O'Neill in his 1976 book The High Frontier: Human Colonies in Space. Alien nanomachines communicating with their maker causes blips in the habitat's power grid. All in all a good read with connections to all of the other Grand Tour books.