It is a book end. Final chapter says next book will be renamed to Panzerkunst Chronicles.
Hopefully we can get more info about Venus and the current timeline, not just the past.
I'm guessing the end of this Panzerkunst Chronicles will be when we find out how Erika dies.
After that, we already know ...

Hi, new member here, I've been around for some time but decided to make an account so I can post.

In regards to Mars having settlers before the events of the story, I think it is quite possible. We only ever have the description that it was an age similar to ours now. However, they had the workings ...