The author is in the process of creating a new novel unrelated to the Dell series. It’s provisionally called Plumb Out Of Time, and is being serialized, chapter by chapter on the Kindle Vella platform. You can read more about it in the News section of this website. Here’s the link:
There is a Dell ‘Origin’ story out there, written not too long ago and never published. I will be happy to send you a download (only 3k words) if you request it. It is titled “Her Education”. Takes place in Dell’s formative years on the streets of Chicago. Similar to the other Dell stories, it is edgy, with some violence, but ends on an up note.