I received a copy of this book from my company when I was still working and dealing with some international clients. It is an excellent reference for anyone involved in international business as you can go directly to the country of interest and learn things that can be immediately used for you in your work. It is also very useful to anyone who does much international travel for work or fun. It does include information about business etiquette which may not be that useful for vacationers but might still be of interest. You could also just read it straight through from country to country just to learn a lot of trivia to pull out at parties. I have found it to be very helpful to me in work and personal travels. It doesn't cover every country in the world, but it does a great job on the many more common ones that people will likely visit.