IMPORTANT - EBOOK edition of this book is an ART BOOK and not used for coloring on the device. The eBook is a preview providing useful content on the benefits of coloring for both children and adults, also showing the brilliant designs available in the physical copy of the book. A BONUS link in the book lets you download books with high quality coloring book PDF pages with dozens of illustrations that readers can PRINT. The download is optional, it is not the main function or purpose of this ebook - PRINT REPLICA. You say you love colors, but do you truly understand the relationship between hues? This coloring book will test your level of color understanding. Each image is composed of fine lines and curves that demand your attention if you don't want to see smudges outside the borders. Go ahead and grab a copy of this coloring book today!