If you want to showcase your favorite books and have a unique conversation piece, these Arrow Magnetic Bookends are a great choice.
You simply place the metal bookends in your favorite book and place it last on the shelf. Then the magnetic arrow sticks to the metal bookends, thus creating a gravity-defying floating illusion.
The arrows come with metal bookends. You can buy them HERE for $30. Your book shelf will certainly look more fascinating now. (Thanks for the tip D.T.)