It aggregates *writers*' recommendations - "8,000+ authors have shared five of their favorite books around a topic, theme, or mood."

These break down well on topics; there's a great #ScienceFiction section:

https://shepherd.com/bookshelf/science-fiction

If you're interested in sf writers and their thoughts, you could do worse than to follow #AppliedSciFi from #ASU's #CenterForScienceAndTheImagination.

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