The Art of Observation: Understanding Pattern Languages by Werner Ulrich

“…Although I was aware of some of Alexander's famous articles such as "A city is not a tree" (Alexander, 1965), the book (Alexander, 1979) never quite made it to the top of my reading list. …”
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Introduction: Toward a “Post-Alexandrian” Agenda by Michael W. Mehaffy, Tigran Haas

“…From Notes on the Synthesis of Form, his first book and Harvard PhD thesis, to the landmark “A City is Not a Tree,” to the classic best-sellers A Pattern Language and The Timeless Way of Building, to his more difficult and controversial magnum opus, The Nature of Order, Alexander has left a body of work whose breadth and depth is only now coming into view. …”
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A Grid Is Not a Tree: Toward a Reconciliation of Alexander’s and Martin’s Views of City Form by Ngoc Hong Nguyen, Khaled Alawadi, Sara Al Hinai

“…Christopher Alexander famously declared that “a city is not a tree,” while Leslie Martin declared that “the grid is [a] generator.” …”
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