Sci-Fi & Speculative
by Isaac Asimov
When scientists discover a parallel universe where physical laws differ, they devise a way to exchange matter between worlds for unlimited energy—but the transfer threatens the fabric of reality itself. Asimov crafts an ambitious narrative across three time periods and two universes, exploring sexuality, politics, and the dangers of short-sighted scientific progress. This Hugo and Nebula Award winner showcases the grandmaster at his philosophical best.
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