Remember 'Purpose' is a goal. Deciding what you want to know from a book. How specific or general it can be will be according to your needs and how much you really want to know, what you want to know.
A question Like what does the like 'What does the author have to say about...?' is acknowledging that at some point you decided that your purpose is, 'that you want to know about this topic'. Questions are useful for helping you to decide what your purpose is. If you are going to 'read' this book and why you are going to read the book.
Questions are for activation and actually pulling that information out of a book. As well as checking if the book will meet your purpose.
A question start you on the track of deciding what your purpose will be, what you are looking into the book for at each stage.
A more correct purpose for the Photoreading book would be "to learn to use the Photoreading Whole Mind System for my reading needs".
Alex
[This message has been edited by AlexK (edited November 27, 2002).]