Personally I would consider that book too technical for my first PhotoReading project. Especially if you are a beginner at piano. Add that to a collection of direct learning.
For your first project choose a book that you would normally want to read from cover to cover to have conscious understanding. Fully activate that so that you gain an understaning of the PhotoReading Process.
The book for Piano studies... what do you need to know first, then what, what comes next? The activation for that comes with actually playing the piano.
Alex