In this richly illustrated book, French architect Dominique Perrault offers his thoughts on the architecture of the Groundscape, a subterranean form of architecture. Although the concept does not entail actually living underground, it does suggest an approach to revealing and marking places for the activities of daily life in the earth itself. Based on exchanges and interviews between Perrault and Frédéric Migayrou, the publication offers an engaging overview of the architects aesthetic vision, its acknowledgement of (and place within) this threshold between earth and sky, and his most emblematic buildings, including Bibliothèque Nationale de France and Ewha Womans University.