I'm looking for a book where there are 3 versions of the human race. The simulated humans, robotic humans, and organic humans.

Either the robotic or simulated humans finds out about a disaster, I think a supernova, that wipes out the organic humans.

I don't remember what happens next, but I think the robotic humans go all around the galaxy and start trying to trail a alien species through several dimensions.

Anybody know the name of this book?

  • Feersum Enjinn shares a lot of these concepts.
    – Valorum
    Aug 30, 2016 at 16:18
  • 5
    Hi and welcome to Science Fiction and Fantasy SE! You might want to bring your question to a more readable state by using semicolons, paragraphs and bullets. Also, any other details, including year of publication or language, would be of great help. Aug 30, 2016 at 16:18
  • Could you contact the person who told you about it and ask them?
    – Valorum
    Aug 30, 2016 at 16:18

1 Answer 1


This is Greg Egan's Diaspora.

From Wikipedia:

By 2975 CE (Universal Time), the year in which the novel begins, humanity has "speciated" into three distinct groupings:

fleshers, biological societies consisting of statics, the original, naturally-evolving race of Homo sapiens...

gleisner robots, individual software-based intelligences housed inside artificial anthropoid, or flesher-shaped, physical bodies ...

the citizens, intelligence as disembodied computer software running entirely within simulated reality-based communities known as polises.

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