Unbuilt tells the stories of the plans, drawings and proposals that emerged during the 20th century in an unparalleled era of optimism in architecture. Many of these grand projects stayed on the drawing board, some were flights of fancy that couldn't be built, and in other cases test structures or parts of buildings did emerge in the real world. The book features the work of Buckminster Fuller, Geoffrey Bawa, Le Corbusier, Frank Lloyd Wright and Archigram, as well as contemporary architects such as Norman Foster, Zaha Hadid, Will Alsop and Rem Koolhaas.