Title: Very weak compared to Ringworld or other early works
Review: The book deals with the conflicts between the moon people who are destined to die as the moon becomes airless, and the space people who are immortal and plan to go on to another star when the fuel project for which the moon was built is completed. We are used to conflicts between groups of people, but in this case the moon people are the children of the space people. Can you imagine raising a child to do your work and then to be abandoned to die? I could not suspend my disbelief that far.
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