Also a series of books...I am only familiar with Culture Shock France by the books exist in versions for other countries. They are very helpful if you are interested in learning why certain people act in certain ways when you travel rather than just being offended by their different behaviour. The books are also helpful to learn how to not offend the people in the country you are visiting. This is very good help in not becoming an ugly American or hated tourist. Of course, the book is based on generalizations and admits that, so not everything is dead on, but for basic mannerisms and an overall sense of the cultural systems, these books are gold.