Understanding Cultural Differences, Germans, French and Americans by Edward T. Hall, Mildred Reed Hall. Interesting, I'd have liked it to deal with more than business but it's meant to improve business relations, so I can't complain! Now I'm reading Green Paradise #5 by Max Rouquette. Only #1 has been translated into English -btw, Amazon review is somewhat outdated, he passed away 6 years ago.