All you need is a black pen and a four-sided imagination The perfect beginner coloring book for colorblind, geometric shape aficionados who can afford nothing more than a solitary black marker (and this book). The following is just five out of the hundreds of possible benefits you'll get when you buy this book: Instant law of attraction of QR codes. You'll suddenly see them everywhere! Intense excitement when playing Scrabble! Lucid dreams of square things like post-it notes, bread and Rubik's Cubes! Increased attractiveness to Rob Lowe and Olivia Wilde! Sudden urges to multiply every number you see by itself! Forget Fibonacci, this is the real Book of Squares. Grab your copy now.