Project Gutenberg has been a thing for a couple decades. I think they are starting to also create free audiobooks from books they have in their collection. There is an TTS AI service that I checked out a week ago (play.ht)and that does voicing very realistically from the text that I gave it and I might spring spend $40 for a month of that service and build some audiobooks. The paid version gives access to more voices and will do 1 million characters of text a year.

Or if anyone knows a good open source online alternative, I’m all ears. I’d prefer to go that route but did not give anything that was a very good solution.