hen Pete says PhotoRead 5 to 10 books a day he meant the PhotoReading step.
Full technique is Photoread 5 to 10 times a day and activate at least one of the each week.
The 10 books can be the same books, different books or in a pinch 1 book at different times of the day.
Blocks of 10 books in one sitting is easy enough however if you're doing one book I suggest you take breaks.
Alex