over 100 books of my kindle library just vaporized

[haertig]

Originally Posted by JSWolf

...what do you expect people to do who bought eBooks from Amazon in good faith and can no longer download them as KF8...

While I consider it totally unethical, and IMHO "illegal", for Amazon to do this, it does reinforce the recommendation oft repeated on this forum: "When you buy a book, immediately download it, strip the DRM, and save it locally". Many of us here do exactly this.

While this definitely should not be a required step, it is a very good idea (if not a mandatory step) to do it anyway. "An ounce of prevention is worth a pound of cure."

When you see multiple examples over time of uncaring merchants abusing customer trust, it makes sense to just automatically take the simple steps to avoid putting yourself into a situation where the abuse will result in problems for you. This does not justify the abuse in the first place, but it is still a wise thing to do.

[DNSB]

Originally Posted by Sarmat89

If you remove the DRM protection, you are creating copies of copyrighted material. The license you have does not allow you to do that.

If I download a book from Amazon and create a copy of that book without removing DRM, that is equally copyright infringement.

Originally Posted by Sarmat89

You buy a non-exclusive license, which the copyright holder can revoke in any minute. You can buy a bottle of beer, but it does not mean you'll keep it forever and can replace it if it expires. Copyrighted material cannot be bought via retail, using the word "buy" for obtaining non-exclusive license is just a figure of speech without legal consequences.

Buy is not just a figure of speech. The jurisdictions I checked give it a very specific meaning in a court. Perhaps we need a law even more restrictive than the "terms “buy,” “purchase,” or any other term which a reasonable person would understand to confer an unrestricted ownership interest in the digital good". See California Assembly Bill (AB) 2426 (Chapter 513) for more about this.