That’s an excerpt. There’s more at the link!
We’ve bought lots of Kindle books from Amazon - it would take forever to download all of them. But the ones we really value, we buy hard copy; we never really trusted that this way of buying important books would last ‘forever’(because nothing digital reliably does, despite what we’re told.)
As far as I can tell, you can still read your E books on the Kindle devices, or on your library at Amazon.