According to google, “nocturne” means:
a) a short composition of a romantic or dreamy character suggestive of night, typically for piano.
b) a picture of a night scene.
Doesn’t the second definition seem broad enough that it could justify the series title: The Tenai Nocturne? Which does sound good to me, and I am inclined to use it.
If I decide I’m satisfied with the titles, I will be NEARLY ready to ask for the cover art. For that, I need back cover blurbs — which I think I can base off the versions posted here, and thank you for your comments on that, everyone — and something close to final page numbers for the paper versions. So, I’m adding an epilogue to Book 1 — thanks for the advice to do that, Kim A. — and then I will be able to drop the books into the KDP template and get a good idea about the page numbers.
So it’s all coming along pretty well!