books.google.com - Koans are enigmatic spiritual formulas used for religious training in the Zen Buddhist tradition. This innovative religious practice is one of the most distinctive elements of this tradition, which originated in medieval China and spread to Japan and Korea. Perhaps no dimension of Asian religous has...http://books.google.com/books/about/The_K%C5%8Dan.html?id=Qs7wXsOte1AC&utm_source=gb-gplus-shareThe Kōan
