i-Clip magnetic page markers are a "neat" page marker concept.  For about three dollars ($3.00), you get eight(8) - 3/4 inch by 1 - 1/8 inch, heavy plastic strips with thin magnetic strips.  The markers fold, and like an alligator, clamp onto the page.  They do no damage the book, and can be moved by prying the leaves apart.  A quick and easy way to mark "Bullet Points" in any book.