All of you outside the USA:
If you're not buying books from Smashwords.com yet, you should be! If you can buy goods over the internet, you can shop at Smashwords. Whether you need the Epub format, Mobi for Kindle, or read on your phone, the options are all there.
My Smashwords author page.
So don't fuss with Amazon only being in a few countries or even the Apple store in in thirty-to-forty. There are no limitations by region at the Smashwords store. Even cooler is that the sample amount is up to the author, so if they want to make 30%, 40%, 50%, or more available to you to check out a book, they can.
So check it out. I think you'll be pleased.