Why would an architect reach for a pencil when drawing software and AutoCAD are a click away? Use a ruler when 3D-scanners and GPS devices are close at hand? In Why Architects Still Draw, Paolo Belardi offers an elegant and ardent defense of drawing by hand as a way of thinking. Belardi is no Luddite; he doesn't urge architects to give up digital devices for watercolors and a measuring tape. Rather, he makes a case for drawing as the interface between the idea and the work itself. A drawing, Belardi argues, holds within it the entire final design. It is the paradox of the acorn: a...