A study of the remarkable balancing act between architecture and engineering. It discusses and illustrates some of the best buildings from around the world, and looks at the relationship between architect and engineer, both from a practical and philosophical perspective. The buildings belong to a wide range of structural solutions that reflect both the architectural intention and the aesthetic sensibility of the engineer. Among others, the Japanese Pavilion (Shigeru Ban/Buro Happold), the Tokyo International Forum (Rafael Vinoly/Structural Design Group), the City of Science (Santiago Calatrava), the Guggenheim Museum (Frank Gehry/SOM), and the Dynamic Earth Centre (Michael Hopkins/Ove Arup) are presented in photographs, detailed architectural and engineering drawings, and prose.