Eight books are previewed in the series preview section of this website. Will there be more Possibilities novels after those eight are published?

There’s a good chance there will be. It’s very possible that what is now Book Seven in the series, currently entitled Shared Possibilities, will ultimately be divided into two or three books. There’s a lot of material in the first draft, probably too much for a single novel. As the current draft exists, the book has multiple major subplots.

Also, at the end of Book Eight, Private Possibilities, there are still some plot threads that aren’t yet fully woven into the story. They could easily be spun off into new stories. I’m already playing with a few scenes in my head and jotting down a bit of dialogue for a story which might be entitled Arjulan Possibilities.