An old friend recommended I read this book .. and it is a monster!
The author digs through severely his thesis of tangled loops as he breaks down the problem across the arts, mathematics, and music. The use of dialogues throughout is quite interesting. While dated in a few areas, I thought it was worth the read. I would recommend hitting it in traunches. My idea of reading it completely was an uphill battle.
Final word .. read it.. slowly, and in bits.