Franky I suggested reading the first few pages normally to see if you found that you were able to read it faster than normal.
Some books I have to read everything because they are so technical (computer programming books for example). The cool thing is that I can read them extremely fast and still understand them after I have done the photofocus step. For me this really is valuable.
The other good thing is that I have the option to just super read and dip other books (given the situation). Other books only have a few valuable sections or chapters so I can skip the rest of the book. What happened when you tried dipping?