If its a text book I think you are looking at it the wrong way. Having someone who has spent serious amount of time on a subject, is like meeting someone who has explored some part of jungle I haven't visited. The info that has accumulated in your head through that process is what is interesting.

I stopped reading books not because AI is mesmerizing but because I find the non-interactive nature of books irritating after too much AI use. ChatGPT allows me to stop and explore something, slow things down, bypass other things, connect it to other things etc etc

My suggestion would be make it interactive. Release it with an interactive interface rag or fine tuned to your ideas and content. Use your imagination on how that interactivity should be shaped.