When doing a group of books, such as three to ten a day, prepare and preview and PhotoRead each book separately.
Don't spend too much time preparing and previewing, especially if the books are similar in content (such as dictionaries). Actually, most people spend too much time getting into state--it takes me just a second. A minute should be sufficient for beginning PhotoReaders after they've followed the self-study course.
I prefer to follow the process of prepare, PhotoRead, and postview (instead of preview).
Try it to see what works best for you.
