Publishers have mandated that textbook availability be held to their country restrictions. The country restrictions are different for each textbook however we do list the country restrictions for each textbook.
To view the restrictions of a particular textbook:

1. Select the textbook you are interested in
2. Once you are on that textbook's page, below the textbook's description you will see the section Additional Information
3. Under Additional Information will be a topic Territories Allowed - This will list all countries that the textbook is available to.

Regards,
Dan