Abstract: The invention provides a book containing a three dimensional model assembly made from a plurality of model components attached to respective pages in the book. The model can be a human body or anything desired. When the book is closed, the model components combine to form a completely assembled model assembly that is thinner than the book. Thus, the book can lie flat on either its front or back cover on a flat surface. When the book is open, and as a reader turns each page, the model components attached to the respective page separate from the model assembly revealing other components that remain combined to form a partially assembled model assembly. The components can be fixedly or hingedly attached to respective pages with bars, flaps or both. If hingedly attached, the model components can be separated from the model assembly without turning a respective page.