Hi! Recently, I've just downloaded a book sample because I was going to buy it later. After a few weeks it has been deleted from the Kindle Store. When I go to the Buy Now option in Kindle Keyboard it says: I'm not entitled to buy this content. (due to copyright restrictions?!)
Why does Amazon do this? Can you buy certain ebooks from Kindle Store for only some time? Why?
How can this be explained by copyright restrictions?
As far as I know ebooks can't have been sold out like real books.
Does it mean that the collaboration between Amazon and the author won't work any more?
Second issue:
There are many ebooks being only available for customers with US billing address. Why? It's strange because it doesn't necessarily mean that the author is from the United States at all.
Third issue:
Even if the ebooks are available for both the Americans and the Europeans, the prices are different for the exact same ebook. WHY?!
I doubt if this could be explained by copyright restrictions again because there are no reasonable explanations on why the exact same ebook costs more for those with European billing address than for those with US billing address?