A new book called The Legend of Zelda: Hyrule Graphics was released in Japan yesterday. Inside it, there is apparently some wording that suggests that more volumes. Volume 2 may release this winter and Volume 3 may release in 2017. North America and Europe will get this book as well, but in the book is called The Legend of Zelda: Art and Artifacts in western regions. The book will release in North America and Europe next February.
There May Be Two More Volumes Of The Zelda: Hyrule Graphics Book

Our version will likely be all three in one. Unless they have three books with 400 pages each😳