Incredible material. This is one book that isn't for a single reading. The author makes his points in a clear, intellectual and readable style(if one is willing to take his/her time, rereading every few lines or so). His theory seems sound, and his examples are profoundly simple, all being exemplified by the excellent illustrations and photographs selected and generously spread throughout. As I read, I felt that he and I were breaking new ground together as I heard myself going "Of course" or "Yes...yes", or "Aha"...and at the very end "My head hurts." Quite a mental stretch.