Welcome to my new friends in Europe

When I started writing mysteries it never occurred to me that I would have readers in Europe. Well, with the help of Amazon's reach, I'm finding that my mysteries are read by new friends, especially in the UK, but also in France and Germany.
I'm also learning that readers in the UK are buying my short story --DEAD IN THE WATER -- almost more than Americans. I'm wondering what that says. That UK readers like short stories more than Americans? That UK readers have broad tastes? I continue to ponder.
WHERE'S BILLIE?, WHOSE HAND? and DEAD IN THE WATER have been available for free during the past three days through Amazon's special promotion. People are gobbling them up. I wonder if some mothers received Kindles for Mother's Day and are now well into the life and escapades of Skeeter Hughes.