Kindle. More thin Brunner. Goodreads reckons this is more chop than the last one, and they're right. Here we're served a North Korea/South Korea setup (making me wonder if there's a plateau and a river there) that underpins a pioneering/disaster recovery superman plot. Brunner (as always) is more interested in social commentary than the scifi; the resource limitations he imposes are more for the sake of the story than plausible. For instance a star going supernova is surely not a matter of hours.