A new issue of Numeracy is out. Mateusz Hohol (PAT): The Normativity of Mathematics: A Neurocognitive Approach. The first chapter from In Pursuit of the Traveling Salesman: Mathematics at the Limits of Computation by William J. Cook. A look at how the fall of Communism changed mathematics in the US. Carl E. Behrens on empiricism as an environment for humanist mathematics. A review of Magical Mathematics: The Mathematical Ideas that Animate Great Magic Tricks by Persi Diaconis and Ron Graham. An interview with Robert Kanigel, biographer of the Indian mathematician Srinivasa Ramanujan. The first chapter from Elliptic Tales: Curves, Counting, and Number Theory by Avner Ash and Robert Gross. Research suggests you can't do the math without the words. A review of The Theory That Would Not Die: How Bayes’ Rule Cracked the Enigma Code, Hunted Down Russian Submarines and Emerged Triumphant From Two Centuries of Controversy by Sharon Bertsch McGrayne (and more). A look at 6 small math errors that caused huge disasters.