Looking at today's announcement of Prime Reading -- has anyone figured out how the available books do or don't map to Kindle Unlimited or KOLL?
I did find jhowell's
post 266, which has a good discussion of KU, KOLL, etc. that I hadn't previusly known about, and my quick test shows that appears to work (test item 9781503951518, which I believe to be in all of KU, KOLL, and KPR.)
If the KPR set matches one of the other sets exactly, we could just use that, otherwise perhaps the great jhowell (PBUH) could add another library-id.
ETA: Prime Reading (KPR) is definitely not identical to KU or KOLL inventories: B017ROWVU8 is an example item that is in KU (and KOLL accodring to the plugin) but is not in KPR.