Globalization of Bookstores

I spent a good hour in the airport-bookstore in Copenhagen just staring at books. Now that I have to wait three hours in Singapore for my connection flight, I thought I'll check out the books here. Oh, what a daja-vu. Took me 5 minutes to find a book I haven't seen in Copenhagen. Even the Harry-Potter pile is about as tall. Biggest difference so far: The collection of Lonely-Planet books for European capitals is not as extensive.