These books appear to make heavy/exclusive use of AI for art. Are they also written by AI?

As much as I dislike AI slop, one of the first things I did when I first saw Chat GPT was to generate some gamebooks to use as test input-data for my gamebook-generator script. Description with a graph showing one of the stories: https://intfiction.org/t/pangamebook/52856/17

It was useful for making those test gamebooks. I also thought (too much) about how it would be possible to use a LLM to generate gamebooks, but probably best to first randomly generate some kind of structure (directed graph) for the story and then make many smaller prompts to ask for the book to be written one branch at a time. However even if I ever get around to experiment with that I will certainly not release any code (or slop) because AI-generated gamebooks seems like the last thing the world needs.