Stop in for a cup of coffee

One of the things that also sets my coloriing book images apart is using shades of gray in the images so that simple coloring gives a much better result by automatically shading the image in the right places. My research today made me realize that the very best coloring books for adults across all categories use this subtlety and the customers love it.

Like this for example...just color the bricks with one color pencil and watch them come alive!