The books are made available per region basis, Portugal is included in the Europe region ofc.
I've seen some books that aren't available to Europe, that ones don't even let me click to buy so it isn't the case.
I'm finding it really odd because I bought my Kindle using a Virtual card created from my real one, but for the books it doesn't let me, and doesn't even let me buy Gift Cards as I previously said.
It isn't there someone from Portugal that could help me? (Well I'll send some PMs to Portuguese people here)
And no, unfortunately I don't have another card to try
