Johnny Maxwell has a new video game. You shoot the aliens, you rack up points. It’s fun. But then one day the aliens try to surrender to him. As it turns out, they don’t want to die. How do you deal with a video game that just doesn’t want to behave properly? And what will Johnny do when other players start turning their games on and attacking? Find out in "Only You Can Save Mankind"  by Terry Pratchett.