An astonishing book. Though it’s written for foreigners planning to travel or work in the U.S. — and serves that purpose splendidly — I would recommend it most strongly to Americans who are planning to travel elsewhere or are expecting to deal routinely with foreign visitors. Americans are very odd. Everybody else is expending considerable effort to treat us as if we were human beings. It is well to know the details of what they are putting up with and, by implication, what is normal for the rest of humanity.