The publisher says:
What do you get when you overlap a triangle with a square or a circle with a star? Watch the wonder unfold as infants and toddlers touch, feel and explore this captivating, colorful, tactile book.
With each turn of a page, shapes overlap and fascinating, bold patterns and new shapes emerge, to the delight of children and adults alike.
Phaidon, 2015, English, 14 Pages, 15x21 cm, ISBN 9780714869759