Adult coloring books have seen an increase in popularity recently and now you can share in that with the relatively new concept of Grayscale coloring. In this fantastic book, Colorful World: Grayscale Coloring Book for Adults, you will find dozens of images to color, simply by shading over the gray in the picture and bringing it into a world of vibrant color. The images are; -Collected from my photographers -Varied, exciting and imaginative -Printed one side only -Full size paper, 8.5x11 When you have completed the picture it can be easily removed from the perforated page and framed. This exciting and innovative form of adult coloring has all the stress-relieving and concentration enhancement qualities of traditional coloring books, as well as providing a professional finish to your work. Try it for yourself today. You'll be amazed by what you can create.