I wouldn't try to learn it from a book because it's hard to correct your own postures and difficult to correct mistakes you've taught yourself later. It's not too hard to find a class where you could learn it.
Waldfrau
I didn't mean learning T'ai Chi from the book so much as that the author lists reasons for difficulty meditating and gives advice on how to improve meditation(as well as rundowns on different kinds of meditation). The author doesn't suggest T'ai Chi only, just exercise in general to aid in meditation.
Hopefully this didn't come off as defensive, I just wanted to make myself clear or correct myself if I sounded like I meant something different.
- Manny