|  | Visual Illusions Coloring Book by Spyros Horemis Beware, the designs herein may boggle your mind and confound your eyes. Does the cube go in or out, is the line straight or curved? You'll have fun deciding which while coloring them at the same time. 32 designs.
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Dazzling Designs by Koichi Sato Thirty ingeniously constructed designs consist of wonderfully intricate interlocking shapes that form eye-popping optical illusions. You'll discover endless opportunities for imaginative and inventive coloring!
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|  | 3-D Designs by Wil Stegenga Striking patterns of closely interwoven squares, stars, and rectangles and flowing interlacements of circles, ovals, hearts, and other rounded shapes. Great for puzzle enthusiasts as well as designers. 30 black-and-white line illustrations.
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|  | Geoscapes by Hop David This riot of geometric images offers a kaleidoscope of coloring possibilities! Dodecahedrons, fractals, spirals, and other mind-bending shapes merge, recede, and explode to create an eye-opening collection of 30 ultra-complex illustrations.
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