I went to NY Art Book Fair at MoMA PS1. There were numerical books designed by artists.
This book is unusual style. Double door pages and the pages are folded like an accordion. The image is same one photograph but cropped to show a part of the image, but you feel the spacial sensing with opening page by page.
This card style book is created by a photocopier artist. The book is a pile of same cards that has a hole at each four corner (the first image below). Pick up one corner and decide right or left to open the cards, then the final out come will be a circle image(the second image below). Which hole to be an axis or right/left side to open, the outcome image and message will be different.
The content of this book below is intriguing. I saw one of the contents of this book. There is an implied circle composed of a to z. It will show triangle or linear shape for one word or sentences by connecting each letter in the word or sentences. This book seems to have deeper contents but I only could see this aspect.