PhotoReading takes advantage of the fact that all books are not equally valuable to you. There's tremendous variation in the information value of different books. Some books are a complete waste of your time. Other books will only contain one or two useful ideas that you'll remember -- the rest you'll quickly forget. A few books will have you hanging on every word. But regardless of each book's value to you, you still have to invest a lot of time to read each one. The Catch-22 is that you have to read each book to determine whether it was worth reading in the first place.