Chasm_City_cover_(Amazon)

This is the second 700 page novel by Reynolds I’ve read this year. I’ve got a third ready to go.

Set somewhat as a “sidequel” to the happenings in the “Revelation Space” arc, this is a slightly more conventional tale, but not without Reynolds’ style of truly mind-expanding ideas.

A detective story, of sorts, set in a post-human society where The Melding Plague has thrown all nanotech into such chaos that the buildings themselves begin growing out of control. Also: a religion that is truly infectious.

The best sections deal with a flotilla of generation ships that slowly begin to form into their own warring nations. It is a fascinating piece of anthropology and a solid example of what hard SF can do that no other genre can.