Anne Lacaton and Jean-Philippe Vassal are known for an architecture that privileges inhabitants’ freedom and pleasure through generous, open designs. The Paris-based architects opened their 2015 lecture at Harvard University with a manifesto: study and create an inventory of the existing situation; densify without compressing individual space; promote user mobility, access, choice; and most importantly, never demolish. Freedom of Use reflects on these core values to present a fluid narrative of Lacaton and Vassal’s oeuvre, articulated through processes of accumulation, addition, and extension. The architects describe built and unbuilt work, from a house in Niger made of little more than branches; to the expansive Nantes School of Architecture; to a public square in Bordeaux where, after months of study, their design solution was: do nothing. Lacaton and Vassal’s principle of doubling space is echoed in the book’s treatment of photography.