Cognitive Surplus Equations That Changed the World Observation Softcover* The Observation | Math

Here’s a pocket-sized notebook that’s perfect for those brilliant ideas you have while riding the subway, doing your grocery shopping or walking across campus. Perfect for taking everywhere, this Equations That Changed the World notebook is ready for your next earth-shattering stroke of brilliance. 

These tiny but mighty softcover notebooks fit perfectly in the palm of your hand. The uniquely textured cover feels soft under your fingers and the elastic closure will keep all your musings safe.