The three pillars holding the books create a base of a pyramid while the enlarged photo of the book placed above creates the illusion of the top of a pyramid.  The pyramid look is also defined by having the yellow strings of paper lined up in the back creating a pyramid.

The display also shows repetition by having multiple pictures and props of the book they are promoting.

URL: http://www.quillandquire.com/blog/wp-content/uploads/Picture-43.png

The stacking of Nutella creates a pyramidal shape.

It also shows repetition by having only one product making the pyramid.

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RL