The Merman's Children by Poul Anderson
Oceanic/marine science fiction
165 books — 270 voters

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Escape Books
46 books — 39 voters
Timescape by Gregory BenfordThe Door Into Summer by Robert A. Heinlein
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1,955 books — 5,241 voters

Radix by A.A. Attanasio
Most Under-rated Science Fiction
2,079 books — 2,149 voters