This grayscale coloring book is about a mischievous group of robots who mysteriously come to life unbeknownst to the artisan who created them. When the artisan makes this startling discover, she goes on a mission to follow her robots and find out exactly what they are doing and where they go when they think nobody is watching. The 44 images in this book are all the things the artisan saw when she was doing her sleuthing to find out what her sneaky little robots were up to.This is a grayscale coloring book which is different from plain black and white line art. There is some degree of gray tones shaded into each picture, and coloring is done over top of the gray as well as white areas or however the colorist chooses to color them. It is all up to you. One thing is for sure.. coloring these whimsical pictures is certainly a great way to relax and will also bring out the true characters of the fun little bots in this book. Any coloring medium may be used to color these images. If you use ink type mediums such markers, it is highly recommended to put a blank sheet of paper behind the image you are coloring to prevent ink bleed-through onto the next image.In addition to designing coloring books, artist Nola Hintzel also creates unique pieces of robot-inspired jewelry. The robots in this coloring book are some of the actual robots Nola has created, and took the craft one step further by incorporating the robots into this very unusual coloring book.