Those of us who grew up coloring remember the cardinal rule: stay inside the lines. But those who pick up the Patterns of the Universe coloring book have to stay in the sines (and cosines and tangents ...

I first heard of the adult coloring book trend from my friend Myke, who described on various podcasts and Slack conversations how coloring mandala-like patterns helps him concentrate and relax while ...

Every item on this page was chosen by a Town & Country editor. We may earn commission on some of the items you choose to buy. Get lost in these mesmerizing designs inspired by math. From snowflakes to ...

An icon in the shape of a lightning bolt. Impact Link These days, it seems you can't make it past the lobby of a Barnes & Noble without seeing an adult coloring book. The genre currently holds five of ...