By George H. Marcus and William Whitaker. Yale University Press, 2013, 269 pages, $65. A Prism for Viewing a Master While reading this outstanding book, I kept remembering the Bill Clinton 1992 election campaign that was defined by the phrase “It's the economy, stupid.” I had to keep myself from shouting, “It's the houses, stupid!” Marcus and Whitaker have not only directed superb scholarship to the study of Kahn's houses—both built and unbuilt—but have shown that the houses can be a lens on a broader understanding of Kahn's philosophy, his interpretation of Modernism, and his appreciation of the vernacular. They