This massive book is a novel about architecture. Conceived by Rem Koolhaas and Bruce Mau as a free-fall in the space of the typographic imagination, the book's title, Small, Medium, Large, Extra-Large, is also its framework: projects and essays are arranged according to scale. The book combines essays, manifestoes, diaries, fairy tales, travelogues, a cycle of meditations on the contemporary city, with work produced by Koolhaas's Office for Metropolitan Architecture over the past twenty years.