I learned the Psi ability of "Scanning" from Eric Pepin (www.higherbalance.com) and I honestly didn't get Photoreading to work for me until I started scanning the books and not necessarily photoreading them.
Scanning is touching something with your heart energy and "feeling" it rather than using a sense to sense it. I got a hand out from Higher Balance with a course I bought from them called "Mind Touch" that teaches it. It's on sale now for $19 but I think you have to call them to get that price. When I photoread the pages I Mind Touch them instead and don't rely on the eyes to do the work. It's pretty cool.
Edgar Cayce is amazing, you can't go wrong reading everything you can about him.