Measurement

Paul Lockhart on his new upcoming book, "Measurement":



In case you're not familiar with Lockhart, check out these older commentaries from Keith Devlin on Lockhart's earlier, famous piece, "A Mathematician's Lament":

http://www.maa.org/devlin/devlin_03_08.html

http://www.maa.org/devlin/devlin_05_08.html