Paul, London and Boston, 1983. Schuler, D. (2008). Liberating Voices: A Pattern Language for Communication Revolution. USA: MIT Press. . Leitner, Helmut (2015): Pattern Theory: Introduction and Perspectives on the Tracks of Christopher Alexander. . External links Pattern Language - Official web site of Christopher Alexander. 1977 non-fiction books Architecture books Vernacular architecture Architectural theory Books about urbanism Oxford University Press books