This book is based on the Dong Sewing Kit for which I found directions for years ago in one of John Neal's newsletters.
I cut out parts for 5 of them sometime around 2005 and they have been languishing in my closet. Here is one of them finally finished.
I was inspired by Matisse to make cutout letters. This turned the project into another one of my slow projects.
The video is not too clear but it gives you an idea of how the book opens and closes.
And here is a link to a YouTube video on how to make this structure.
And these great directions from Cathryn Miller.