I also like my books to lie flat, but I take them to the office store and have them punch holes in them and put them in 3-ring binders, you can purchase them at your local Dollar store or even office supply store, I buy then when back to school sales start, you can even get the ones with the clear cover and insert the cover in the front and make a title card to put in the clear part on the binders side, they look very nice and neat lined up in your bookcase