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 ...

Everyone is always asking me for wallpaper, so I decided to meet you halfway and create a wallpaper inspired coloring book. In this video I flip through my new Wallflowers book, packed with vintage ...

Gabe Coeli of Portland, Ore., is devotee of zen meditation. But in the middle of a busy work day, he often takes a shortcut to mindfulness and stress relief by doing a little coloring. His assistant ...