Maxium space in the mudroom by using a sliding door vs a door that swings inside of the room. Keeps the clutter concealed and is an interesting architectural feature. And, a reminder, you can buy the hardware for a barn door at a Feed Supply store.
This could easily be made with some plywood and a couple of 2x4s. Either way, good space-saving idea for small apartments. CARAMELLA Counter Sofa
Sliding doors are a great solution when space is at a premium -- they can also be really fun, like this one!
For the teeny tiny bathroom. Good for phones (of guests) or air-freshener or even a few small decor items. Not books though...yuck, I can't abide by the thought that people in a toilet performing excretory acts are handling books...