Bernardo Carvalho: Trocoscópio

Hello again, dear friends! And Planeta Tangerina again as well. And Bernardo Carvalho. With 142 triangles, rectangles, circles, dots in yellow, green, red, blue, pink, orange and purple changing from one side to the other.

 (Bernardo Carvalho: Trocoscópio, 32 pages, ISBN 978-989-8145-25-3, Planeta Tangerina)

This was also a gift.  More Planeta Tangerina here, here and here. Seems like I really love their books ...