CriminOlly’s mistake is that he believes and expects to own the book and to be able to store it forever wherever he wants:
But Amazon’s terms and conditions are clear:
1. Kindle Content
Use of Kindle Content. Upon your purchase or access of Kindle Content and payment of any applicable fees (including applicable taxes), Amazon grants you a non-exclusive right to view, use, and display such Kindle Content (for Subscription Content only for as long as you remain an active member of the underlying membership or subscription program), solely through Kindle Software or as otherwise permitted as part of the Service, on the Supported Devices specified in the Manage Your Content and Devices section within Your Account (which may change from time to time), and solely for your personal, non-commercial use. Kindle Content is licensed, not sold, to you by Amazon. Amazon may include additional terms of use within Kindle Content. Those terms will also apply, but this Agreement will govern in the event of a conflict. Some Kindle Content, such as interactive or highly formatted content, may not be available to you on all Kindle Software
“Supported Device” means a mobile, computer or other supported electronic device on which you are authorised to operate a Kindle Software, including a Kindle e-reader. For more information on Supported Devices, please see here (https://www.amazon.co.uk/supporteddevices).
www.amazon.co.uk/gp/help/customer/display.html?tag=gransnetforum-21&nodeId=201014950
... non-exclusive right to view, use and display …
I see nothing in there about storing or keeping forever - no different to access to e-books and e-audiobooks issued by a public library which we fund through out local taxes rather than pay fir directly.
This doesn't affect Kindle users who download books to their Kindle and read them on their Kindle.