Download or read book BRAIN GAMES OPTICAL PUZZLES written by Ltd Publications International and published by . This book was released on 2016-07-15 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: More than 135 puzzles, illusions, and activities in this four-color book, with answer key in the back. Features optical illusions, visual puzzles to challenge logic and spatial reasoning, and color-by-number illusions for readers to complete. Convenient spiral binding with colorful, appealing design throughout.