Not to be tiresome, but these are NOT just the ones recorded by volunteers. These are professionally recorded.
“Made in USA?”
thre’s nothing wrong with that, maybe, but, um…
, it is digital content
there no product being manutactured by workers.
it is a license code. very possibly people in USA helped create it.
Are these audio books abridged, and can they be played on an Amazon Alexa or Echo device?