This is not an anti-Kindle rant. I have purchased (rented?) several Kindle titles myself.
However, YSK that you are only licensing access to the book from Amazon, you don’t own it like a physical book.
There have been cases where Amazon deletes a title from all devices. (Ironically, one version of “1984” was one such title).
https://www.nytimes.com/2009/07/18/technology/companies/18amazon.html
There have also been cases where a customer violated Amazon’s terms of service and lost access to all of their Kindle e-books. Amazon has all the power in this relationship. They can and do change the rules on us lowly peasants from time to time.
Here are the terms of use:
https://www.amazon.com/gp/help/customer/display.html?nodeId=201014950
Note, there are indeed ways to download your books and import them into something like Calibre (and remove the DRM from the books). If you do some web searches (and/or search YouTube) you can probably figure it out.
Also to add that amazon has been caught encouraging users to “refund” e-books and purchase a different one, without telling users that these refunds are clawed back from the Authors.
Then to double fuck the Authors they didnt give authors detailed statements - only payments of the monthly total, so any “refunds” were deducted from the total sales from that month and author paid the difference. This was only noticed when an author with an accounting/finance background noticed a negative payment statement one month and looked into this and found amazon routinely charging back authors, sometimes for multiple copies of ‘refunds’ that didnt actually get refunded, straight up stealing from the Authors.