There comes a point where do you ask what's the point. Why PhotoRead a book 10 times if you can activate it in the same time of 8 PhotoReadings?
Lets say a book take 2 minutes to PhotoRead and 16 minutes to activate to your satisfaction? Why PhotoRead it 10 times and remain uncertain of the books content?
If you're only PhotoReading to develop your skill in the PhotoReading Phase you can PhotoRead a book 100 times if you have no other book available. Variety is the spice of life and PhotoReading other books is usually more rewarding than PhotoReading the same book over and over. Anyway if you only have one book available why PhotoRead it at all. You might as well study it at your leisure. 
Alex
