Simple $3 DIY Nook stand
This isn't pretty but it's cheap and it works. I bought a hard plastic "plate stand" at a craft shop for $3, glued strips of the rubber that keeps rugs from sliding onto the bottom and trimmed them with a razor blade and then stretched a rubber band across the stand at a place where it would give rubberized "traction" to the Nook either horizontally or vertically (without the rubber band the Nook would easily slide sideways if the stand was tilted). That's it. The plastic-coated metal back support adjusts infinitely, the Nook stays at exactly the angle you place it and the rubber strips and rubber band keep the stand in place and the Nook very solid on it. I've used this on four plane flights so far and it's never moved an inch even when the plane turns or banks. It's small, it folds up and its weightless. Ugly but handy.