Yup Kiwix, an app available for Android, iOS, Linux and possibly other OSs too.

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.

Mostly due to previous physical constraints, I would argue. Thankfully there are fewer chances your hard drive is going to decompose into vinegar while sitting in your cupboard, and even if it does, it's likely not the only copy.

They're also more limited for current data because they're harder to parse and convert into other usable formats, but thankfully that will get better over time too.

I still preference text-first data for various reasons, but let's not dismiss the leagues of potential video has for communication and archival value, both intentional and unintentional.

Plus writing dgaf if you get hit with a carrington event

Super cool never knew about this. I got probably 1-2tb I can spare for the effort.

What a fantastic resource, this is exactly what is needed. I also found about The Standard Template Construct Library:

"Learn about how to access large corpus of high-quality scholarly texts using Python and use them in AI apps"