In the introductory essay by photobook historian Kaneko Ryuichi, published in The Japanese Photobook, 1912-1990 (Steidl, 2017), he describes a photobook in these terms:
We hold a book that represents a Reality in one volume, containing a Vision that the person or persons who created the book have tried to depict. We turn the pages of that book, and by comprehending the words and images recorded there, we receive rich emotions and diverse messages.