Science on Walden Pond: The Bedrock of Truth in a Warming World Walden Warming: Climate Change Comes to Walden Woods .By Richard B. Primack . (Chicago: University of Chicago Press, 2014. Pp. xii, 264. $26.00 cloth; $15.00 paper; $18.00 e-book.) Walden's Shore: Henry David Thoreau and Nineteenth-Century Science . By Robert M. Thorson. (Cambridge: Harvard University Press, 2014, Pp. xviii, 420. $29.95.)