Came across an interesting article sometime ago. The person had all her books deleted off her kindle. The reason was she bought them from Amazon in a different country.
Turns out Amazon don't sell ebooks

they sell licences and the ebooks where not licensed for her country. Yes that icon you click on " buy the ebook" really means buy a licence for the ebook.
My question is are you also only buying a licence from places like kobo, B&N etc?