Yesterday I finished Neal Stephenson’s Seveneves. It is a great read, well suited for summer. The plot is simple enough to explain spoiler-free: The moon blows up for an unexplained reason. What happens next? It’s a long read, but that’s because it’s actually two books in one. It’s 870 pages. The first two thirds are one continuous story, and the last third is a separate story that takes the result of the first story and runs wild exploring the longer term implications specula...