Is there anyone who know where I can buy a fan art book of this game? It can be on japanese the book but not an japanese site. I don't understand how to buy on that site.
If you still are searching for a way to purchase it, I'd suggest you try http://www.amazon.co.jp/gp/switch-language/product/486233153X/ref=dp_change_lang?ie=UTF8&language=en_JP Amazon is reliable, even though the handling and shipping costs are quite high to Europe.