It reads a lot like Mother Earth Mother Board, in that it's a travelogue long-form article about a device that doesn't actually exist yet.

It's not really a "novel" in the sense of having a "plot". Anyone who has read the wikipedia article on sulfur injection can safely skip it.

I didn't hate it, even though it played out more like a REAMDE type thriller than some of his earlier stuff (Anathem, Baroque, etc). I liked Seveneves, though.