Foreshadowing of 21st Century Art: The Color and geometry of very early Turkish carpets by ChristopherAlexander. Oxford University Press, 1993. ISBN 0-19-520866-8
Alexander's book about his carpet collection and his early insights into geometry, color, and beauty. In it one finds the genesis of the 15 structural properties that would later form a foundation for the TheoryOfCenters? in NatureOfOrder.
See ForeshadowingTwentyFirstCenturyArt for discussion.