I had actually recently heard about this book and didn't pay much attention but when you mentioned it felt like something that I needed to check out. I'm only about 30 pages in but I'm very intrigued and excited about this book so far.
I am also reading "A Thousand Names for Joy". My friend bought it, and found it a bit difficult to read. I try and read a couple of chapters of the Tao te Ching, translated by Stephen Mitchell(Katie's husband) in the morning, and then the same chapters of Katie's book in the evening. I really like it.