I also listen, as I've done for 40 years since my first SpeechThing. Now I have end-to-end harmonic mixing thrown in. I automate Firefox scraping of daily articles, but for longer books, I read as much as I want and when the session closes the remainder is queued up at the rear, so I get back into those queued books in the quiet weekends when then articles are exhausted. I listen from very early morning until midday.
I'm not familiar with the tech; what is harmonic mixing for audio book readouts? Would you please elaborate?