It seems to me that this is not so important because in modern art, there are no rules, there are only tendencies. Essentially, the art form of the artist’s book (an artistic book) is a modern artistic form created by the artist, and this would be a possible answer to the question.

Since it is about an art product, generally the artist’s book is an individual vision and a selection of creating a policy freed from editing, publishing and marketing, and above all from censure and reviewing.