The reader will, like Einstein, need a breath of fresh air after reaching the end of The End of Everything. But keep your eye on that W-shaped gathering of stars above you. It’s called Cassiopeia. Do you see the nebulous smear of light a couple of inches below the second bump of the W? That’s the Andromeda galaxy, racing towards us at 402,000 kilometres per hour. When the crash happens, the two supermassive black holes at the centres of our galaxies will fuse rather dramatically. I’m not spoiling the plot of The End of Everything by revealing this. It’s a small red herring on the way to the main crime.