I think the one per month thing is still called Kindle Owner Lending Library. If you buy a Kindle or Fire, you can borrow one book per month from what is essentially anything with Kindle Unlimited tag. You do not have to join Prime or KU. But you cannot read it on a non Amazon device (hmm would Echo qualify?). If you are either Prime or KU member then the one per month benefit effectively does not exist. Last time I checked, and it took a bit of trouble, there were only two books in KOLL that were not in the subscription selections.
|