This is a distinct take on Le Guins “The Dispossessed”, wherein a crew made up of survivors of pointless suicidal mission to a distant exo planet comes back to an earth far different from the earth they left. It becomes an exercise on the prisoner’s dilemma and the survival story kicks off from there. It’s a good listen. The sci-fi and maths are barebones and accessible to all readers. I’d recommend this to anyone looking for a light listen that you can listen to on extended drives.