Charles Stross At His Finest

I almost miss this book because of mixed reviews here and there. I would have been wrong.
It's all good, just a little bit heavy in some passages, but everything fits, and we pay for:
was the solar sail, the virtual world, nanotechnology, artificial intelligence, alien artifacts,
aliens, credible protagonists, controlled narrative.
Stross rises here at a Vernor Vinge, Neal Stephenson and Greg Egan.
Do not miss.