Well done for doing some market research before rushing off to code. This is far more sensible than coding first and wondering later. To answer your question,

Well done for doing some market research before rushing off to code. This is far more sensible than coding first and wondering later. To answer your question, no. I read a lot and frankly I've never wanted to discuss anything with an author. My relationship is with the characters in the book, not the author. For non-fiction books there is so much information online that if I want to dig deeper I'll just Google or Chat it. I've written two text books myself - very (very) niche books that sold in the hundreds of copies. (So very small). I've never had a reader reach out to discuss anything. Yes, I expect there are people out there who want to correspond with authors. But I suspect a large fraction of them aren't "curious" but more want to demonstrate competence or whatever. I doubt an AI would satisfy them. Yes, I think there is a market (however thin) for this, but reaching that market will be close to impossible. I would suggest either building this knowing you'd be the only user, or abandoning the idea.