Using a simple little trick, this bookholder makes it look like you are using the force to hold your books in place despite gravity.
This may not be the best way to store your books or the best design ever, but it is pretty sure that it will make an impression on people visiting your home. It can be purchased on Amazon, or, if you own a 3D printed, you can download a 3D model of a similar design on Thingiverse.