A coloring book of mandala patterns by Nobuhiro Maruyama, who is also a doctor. The designs are "kusurie", the name Nobuhiro Maruyama gives to their own pictures built from geometric patterns. You color each one freely in any colors you like.
The book comes with 48 kusurie stickers and kusurie sheets that can be cut out. It also explains different ways to use the pages, such as copying a design to color it again, or cutting out a finished picture to display in a room.