I wish I had found these sooner. I am reading multiple books at a time now and have been using anything I could find - post-it, scrap paper, candy wrapper, etc. They are also great for marking commonly used recipes in your cookbooks. I don't like to "dog ear" the pages, it can be unreliable. The best feature is the arrows on the backside. You can indicate right where you left off. Originally I thought they were separated so you could put them in the middle of pages. The more I thought about it, having them on the edge makes it easier to find. However, you can split them in half by cutting along the sticker between the two magnets.