Have you ever wondered what makes "seventh heaven" and "cloud nine" so blissful and the number 13 so unlucky? Or why "fourth-dimensional" thinking is really out of this world? Inside Easy as Pi, you'll find the "4-1-1" on: Seventh heaven and what makes it so blissful The number 13 and why it's so unlucky Imaginary numbers and how they exist The binary system and how it manages to say so much with only two numbers How your bedding has nothing to do with being "three sheets to the wind" The burning literary question: Why did Ray Bradbury name his novel Fahrenheit 451? A block of Social Security numbers that will never ever be assigned to anyone