If you are one who loves optical illusions, you are sure to enjoy The Collection! From very simple block graphics to more complex patterns, The Collection contains many curious and visually stimulating designs. While your mind will be tested, your eyes will be fascinated by impossible dice arrangements to perplex nut and bolt combinations. You are sure to do a double-take! The creative 3D optical illusions will fascinate and even appear to move as you view the many challenging cube designs, shifting shapes, and cerebral-teasing structures. And wait until you experience the patents pending category, where you will find proprietary preposterous perpetual-motion power, delightfully designed derived devices, and many more marvelous mechanisms! The Collection is the fourth book in the series of exciting optical illusion books, joining 3D Crossword Puzzles - Optical Illusions Book I & II, and 3D Mazes - Optical Illusions! Enjoy!