Study Beds allow you to turn any extra bedroom into a study and back into a bedroom in seconds. What's especially clever about the design is nothing on the desk's surface has to be moved or even disrupted when it lowers and reveals the flip down bed. Available in single and double models. Now for the downside....looks like they're only available in the UK, and they're not inexpensive either. BUT the website does provide some tech specs, close-up pics of its construction and videos of the bed in action. All this, of course, leads me to wonder if it could be DIYable. Latches, pulls and some fancy gas springs....hmmm.