Sounds like you're all talking about the Carl Poe book - is that correct? (I couldn't get the link to work.)
I am fortunate in that he trains out of the rink I skate at, so a year ago I scheduled a private session with him for 45 minutes to be sure that I was doing everything correctly. It was well worth it, and I religiously follow his training suggestions for my off-ice. The sport cord drills for jumping have strengthened my hips and landings, and I use "his" stretches to help gain flexibility. I'd highly recommend it.
The other book which has been very helpful to me is called "The Inner Chamption: Mental Toughness Skills for Figure Skaters." I think the mental side of skating is as high as 90%, and this has helped me lose some of my testing fear and (I hope) will help me when I begin to compete.