

(1957) In Norton's 1954 book, “The Stars Are Ours,“ scientists escape an antiscience populist government (ahem) to establish a colony on the distant planet Astra. This follow-up takes place about a hundred years later, when the colony is well established and a threat from Astra's distant past reemerges -- at the same time explorers from a very different Terra arrive. It's a good adventure, and also a light riff on themes of cultural evolution