Hofstede was one of the first to study the impact of cultural background on personal preferences and actions. In this book, he describes the experiments and findings in a way that is entertaining and inspiring at the same time. The model that he developed is clearly explained and the various situations that are mentioned in the book clearly prove the point.
If you are looking for a book that helps you understand other people's background, this is it. It goes beyond the do's and dont's in other cultures.
And the second edition incorporates new findings, so even more useful.