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Nagata's world-building here is pretty cool. The setting is a ringworld-orbital where things have gone Terribly Wrong. A long-ago war damaged the habitat, and the construction & maintenance nanoassembler-fogs (the silver), have become a menace to the players, their 'mechanics' (cool hi-tech machines) and their homes. The only safe places to live are temple-complexes around kobold wells -- the temple kobolds, small programmable mechanics, exude a sweet-smelling silver-repellent.
It's a pretty neat setup, an appealing combination of a half-understood high-tech background, a likeable heroine, a nasty villain, and a Quest... So I was having a good time until along about p.200 or so, I started realising that nothing much had happened for awhile, except that the Evil Villain (and/or his minions) was chasing the heroine (and/or her Faithful Friends, and always with her Cute Doggie) through varying landscapes, over and over again. I'm sorry to report that this is pretty much what happens in the rest of the book. The ending's pretty soggy, too.
I'd say Ms. Nagata needed a Stern Editor for this one, or else more inspiration.... Anyway, most everything else she's written is better than this. If you've never tried her (and you should), I'd start with LIMIT OF VISION, her best novel and a standalone. Or, for an appealing sample, her Nebula-award-winning novella "Goddesses", available online.
Happy reading--
Pete Tillman