Coloring lovers will enjoy the great variety of different sketches in this ZEN Coloring Book The designs inside have a variety of difficulty levels, so there will be something for every one to apply your creativity. Make use of a big choice of coloring tools - markers, pencils, pens, colored pencils, or even a combination of all of the above. As each image is printed on its own crisp white page, the effects of any bleed-through are prevented.