How to release a book in different languages on iBooks

I would like to release a book in several languages like German, French, Japanese and English. So that each country can acces the book in their respective language.

How does one go about doing this. Do have to realease a different versions via iTunes connect and then make them availble only in the countries where they apply. Each time using a different ISBN number ? Thats the only way I see of doing this at the moment.

Whats the best method.

Thanks