The fourth volume in a series of monographs celebrating the innovative architectural designs of the highly esteemed international firm. KPF initially distinguished itself through its attention to the most characteristic American building type, the skyscraper. The evolution of the tall tower is a key part of a sustainable paradigm in which individual buildings form part of a larger system of vertical centers linked by horizontal networks of public transportation. These "vertical cities" represent a sustainable model for future development where public transport is encouraged, land is conserved, and energy and water uses are reduced. KPF leads the way, creating enduring architecture with contextual sensitivity, flexibility of use, and care for the environment. KPF has achieved international stature, becoming the first firm to be a member of the United Nations Global Compact. This, the fourth volume of their work, explores their recent buildings in detail. The projects include buildings that have transformed the urban fabric of their respective cities, such as the Roppongi Hills Tower complex in Tokyo and the Shanghai World Financial Center, the tallest skyscraper in Asia.