Wow, that's a lot of listening.
I have trouble with audio books myself. I find the static voice detracts a bit from my imagination developing mental images of the characters.
I tried a couple where there were multiple actors doing voice overs, so to speak, but let's just say they should have stuck to being waiters.
They are a great alternative medium though. Definitely a wonderful thing for the vision impaired, elderly or people with dexterity issues, long road trips or people who just enjoy the style.
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I'm Riffing. People usually stop me when I'm riffing. Or carry on without me. That's also an option.