A fantastic Guidebook to design thinking which if you use it as an aide rather than a Bible will educate and enrich your designs. Would love to see an updated New Edition.
A Pattern Language: Towns, Buildings, Construction by Christopher Alexander, Sara Ishikawa, Murray Silverstein, Max Jacobson, Ingrid Fiksdahl-King, Shlomo Angel
A Pattern Language came out in 1977 authored by Christopher Alexander with some of his students Sara Ishikawa, Murray Silverstein, Max Jacobson, Ingrid Fiksdahl-King, Shlomo Angel.
At the time I believe Christopher Alexander was teaching Architecture at Berkley and the first group of books he wrote sprung from his teaching, research and designing there. It is one of a series of Books by Alexander but A Pattern Language is his most widely read work.
Alexanders books principally A Timeless Way of Building, A Pattern Language and The Nature of Order have inspired a following not just in Architecture but in other fields also principally Computer Science where his work is more influential than in Architecture.