Title: Different, hard, fascinating
Product review: One of the great things about SF is how it gives you new concepts to think about. You know, spice-giving sandworms (Dune), a sea of grass (Hyperion), a cylindrical sea (Rama). This one has spun a world around communicating with chemicals. There are others concepts too - humans genetically adapted to life in a vaccum, minds uploaded to machines with multiple instantiations ("ghosts"). It's good hard SF. Sometimes a bit too hard, but I found it well-worth the read. I will probably also read Deception Well soon.
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