A flag book is a type of sculptural artist book invented by Hedi Kyle. It is based on a simple accordion book, in which papers are glued to the sides of the accordion. These papers stick out like flags, hence the name. Examples of artists who have used this structure can be viewed here.
Not only is this book an interesting and innovative means of creative expression, it is a great structure for designers or for material display. Instead of paper for the flags, consider photographs, fabric, wood veneer, or some other thin material.