Banks is teaching about the Vietnam War and its aftermath, but is bedeviled by nightmares about his and Joy's time travel, their adventures and deaths. Are these premonitions about their forthcoming time travel? Or something more critical to this series?
It should have ended this way and surprisingly it did. I hope that eventually some of the Never Again books will make it to the middle and high school reading lists at they do show the horrible reality of state-organized extermination of their citizen. The writing style however could be considered low-brow by some standards.