After The Legend of Zelda: Art and Artifacts, a book announced to celebrate the 30th anniversary of the Zelda series, two more books will be coming out to mark the occasion, and the second one was revealed to be Hyrule Encyclopedia. According to Nintendo Everything, this second book will offer information on several items, enemies, characters, and dungeons from the Zelda universe.
The book will be releasing on February in Japan, but if all goes well, it should also be coming to the West later in 2017. Fingers crossed!