Makeshift Book Displays
I've always been jealous of Dave Kellett's book display. He got the brilliant idea of buying plate holders (the kind you use to display decorative dishes) to hold his books upright. They were vinyl-coated and they folded down flat for easy packing. He always carried extra, and I was always bumming a couple from him when we exhibited together.
So imagine my joy at finding these. They're vinyl-coated plate holders, but they also have a hinge on the back to support tall objects (like my books)! And, like Dave's, they fold down flat.