An artist’s book in which the art is photo-based. Photographers have been collecting their pictures in books since photography was invented. The term photobook is a more recent construction, and can be defined as a book in which photographs make a significant contribution to the content, though the sequence and placement of images, their relationship to text, and the scale and materiality are also of utmost importance to the maker. Though it can be made up of preexisting individual artworks, a photobook is often intended as a cohesive artistic expression.