Things have been a little quiet around here lately, so by way of an apology, let me explain why this is so. And also why "Invisible Sun" is so late.
Back in late 2013 my editor at Tor, David Hartwell, somehow charmed me into writing a follow-up trilogy to the Merchant Princes series.
"Empire Games", the trilogy, was originally due to come out starting in 2015. Indeed, David was gung-ho to push out all three novels at three month intervals, like Jeff Vandermeer's Southern Wake trilogy. Unfortunately, what David hadn't reckoned with was that I was already committed to publishing a novel a year via my other publishers, and my natural output rate is about 1.5 books/year. Also, David was that rare bird in these modern times, an editor who liked to edit. Indeed, he just about edited me to death. The first two novels, "Empire Games" and "Dark State", were undoubtedly improved by his diligence, but it served me as a crash course reminder in why I had resolved never to work with David again after the first series. (If you've ever had a charming but intensely annoying micromanager: it was like that.)
So we were just getting to grips with "Invisible Sun", a couple of years late (that kind of delay happens when your editor edits the first two books three times) ... when a bookcase fell on him and he died.
(It gets worse.)