This stunning assortment of geometric black-and-white designs features 31 full-page patterns of intricately interlocked figures that lend themselves to optical illusions. After colouring, put on the enclosed glasses and watch them take on 3-D life. Pages are perforated and printed on one side only for easy removal and display. Specially designed for experienced colourists, Techellations and other Creative Haven® adult colouring books offer an escape to a world of inspiration and artistic fulfillment. Each title is also an effective and fun-filled way to relax and reduce stress.