1973 Hugo Award for Best Novel
1973 Locus Award for Best Science Fiction Novel
1972 Nebula Award for Best Novel
In the year 2100, mankind on Earth, settlers in a lunar colony and aliens from the para-universe, a strange universe parallel in time to our own, are faced with a race against time to prevent total destruction of the Earth. The invention of the Inter-Universe Electron Pump has threatened the rate of hydrogen fusion in the sun, leading, inevitably, to the possibilty of a vast explosion -- and the vapourisation of the Earth exactly eight minutes later . . .
Genre: Science Fiction
Genre: Science Fiction
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