TreeHugger has shown many ways to hide the bed; most are designed to gain more space. But the Red Nest by Paul Coudamay doesn't; the bed is still there taking up space, but is hidden by the sliding bookcase.
guest bedroom nook that offers guests privacy if you close the sliding door, and is an open, nook-y space otherwise. bookshelves feel off-balance to me, but yay books! Moon to Moon: Hibernation: Cosy bedroom nooks. ---- This would so be my room.