About the Cover of Creative Doing1 link

The nine polyhedral shapes that adorn the cover of the book are from hundreds analyzed and drawn by geometer Max Brückner (1860–1934) and published in 1900. They were digitally recreated by Bernice Liu.

Mathematically speaking, there are infinitely varied polyhedral shapes—just as there are an infinite number of versions and variations of each piece of work in the creative process. Each new day creates an opportunity to make a new shape. It’s through making a lot of shapes that the ones you like start to emerge.