What the book doesn't have: there is no magic formula, only some suggestions- some meditations (my word) that you can use for paricular goals. But the basic message of the book is that anyone can do it, and all you have to do is get a crystal ball, and focus your attention on it for a few minutes and leave yourself receptive. So I reccomend getting the book (Uma Sibley's book- I still haven't read the other one) but don't read it at the expense of time that you could be using to actually *do* the crystal ball gazing.
On the whole, the experience of reading the book was a positive, but it was also an avoidance tactic feeding the part of me that is maybe a little afraid of what I might find in that ball. The little gazing I have done has been similar to the experience of petting an orca at Sea World: I can feel that there is a lot of power there, but I have no means to determine just how much power because I'm only feeling the surface- I have no clue what the depths are at this point. I haven't felt this way about a lot of things in my life, and honestly this makes me hesitate with a bit of fear.