It's a fairly old book, but it's a good one. There is an emphasis on various forms of breathing and imagining, and I've found the exercises to be extremely powerful and entertaining.
Some simple exercises have affected me more powerfully than most forms of hypnosis and meditation.
Some exercises are sort of like breathing into images and affirmations and involve the whole body with the breath. I find that the use of breath and the entire body puts an incredible amount of power into the image and affirmation ... or, rather, they all work together to have a powerful response. This is especially true when they all match aesthetically (for lack of a better way of putting it). The feeling is a lot like dancing to really good music.
There is this cleansing breath where you imagine that negativity is being swept up and away from your body in synchrony with your breath. I was listening to music while doing it, doing it to the music, and the whole experience became extremely powerful. Later, after I was finished, I had a whole series of images, sensations, and memories spontaneously occur where things were being swept up out of me. It was very emotional and very powerful. I was left stunned for a moment, thinking, "Holy crap ... this stuff really works."
[This message has been edited by babayada (edited October 22, 2004).]