22 transparent slides in a folder, and a 16 page brochure. Today's cities are hybrid entities based on multilayered and sometimes contradictory organizing principles. As complex networks of geographic, economic, political and cultural segments, they are caught up in a constant process of differentiation. How are we to understand such dynamic processes, especially the complex connections between individuals, whose movements and interactions leave traces in the urban landscape? This publication offers architects, urban planners and general readers interested in city design and growth a novel approach, a mapping tool that creates a framework for understanding the continually changing configuration of the city. With the aid of themed transparencies, the tool allows one to superimpose various realities in layers in order to create new urban connections, thus inviting readers to immerse themselves in the complexity of our cities.