The only thing to remember when you Image Stream a book you have PhotoRead is the image stream will be a metaphor and you need to decode the image stream to understand the message in both the book and your Image Steam.
It's a good way of building your curiosity and interest in the book and a good opening to activation.
What you get from the Image stream won't necessarily be the story line or messages from the book. They will be your grasp of the information contained in the book.
Alex