Just finished his book. It's a great sci-fi novel in the post-space opera vein. The story is quite understated, but involving. Drags you in but isn't an adrenaline rush.
Basic story is this: A future Earth is threatened by giant nanobot clouds that will reach us in 20,000 years and appear to target objects made by intelligent races. While investigating the origins and nature of these giant clouds, scientists discover an inhabited world that will shortly be hit by the devastating clouds.
I'm not keen on series-type books, but this works well as a standalone book. It's also part of a loose series, which I'll start trawling through shortly.