Print bookselling remains artificially silo'd by country even today, for variety of legacy historical and logistical reasons. But by contrast, the global ebook marketplace is a seamlessly international one.
For authors, selling an ebook to a reader in a different country is just as easy as selling to a reader in your home country. Barriers to reaching an international audience no longer exist.
Today, with the click of a button, any author can start selling any title they wish simultaneously in 12 country-specific Amazon stores, 36 country-specific Kobo ebook stores, and over 40 country-specific Apple ebook stores.