"It may be this plot element that seems to have truncated the publishing of this continuing series..."
I guess you haven't been following the series. It's now up to about 10 books, including "Homeward Bound" that just came out. It certainly hasn't been 'truncated'.
Sam Yeager found out that the Lizards were going to undertake a massive atomic retaliation against the world that would have killed hundreds of millions of people. He also did not like the fact that we launched a sneak attack against civilians. He did what he thought was right. But even later he still is conflicted about the incident and wonders if he did the right thing.
It was certainly not an easy decision for him.
I have been looking for more books in this series but none have shown up at the local Barnes and Noble. Can you provide a list of the books in the series?
Thanks.