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The Starchild Trilogy is an omnibus book published in 1977 by Frederik Pohl and Jack Williamson.
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World at the End of Time is a 1990 hard science fiction novel by Frederik Pohl. It tells the parallel stories of a human and a plasma-based intelligence who manage to survive to the time near the heat death of the universe. The book is thus a combined work in speculative cosmology and space colonization.
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