Got to the bench to do some work today. This is something I copied from a photo. I am going to work it out as a kit for the shop, so this is my test piece.
It is called a 'checker board' book - and I cut a circle out of the cover so you can see the colours inside.
On the inside the paper is cut in steps so that it forms a chequer board pattern of colours. If you use a double sided 12" square you an get all the pages out of one piece, plus the covers, so it is a challenge to get it all lined up and neat - but not expensive to make.
Now ALL I have to do is write the instructions