The face frame is attached to the case with pocket hole joinery (pockets on the exterior of the case). So for both in- and out-swing doors, I use what’s called a pivot hinge.ġ1. Even though the tendency to sag can be mitigated some with a caster on the strike side, eventually those hinges will become loose and falter. Fo r an in-swing door, you can use regular door hinges placed on the back of the case but I don’t recommend it. The secret to making a bookcase door function is in the hinges. Whether a person wants to hide a safe, have a safe room or just find a creative way to hide a utility room, a bookcase door is a fairly easy way to go about doing it. As an adult, their mystique is still appealing, though having built several of them now their functionality is no longer a mystery to me. Growing up, my mind would race with possibilities, as I’d watch someone unlock a bookcase by tilting a book or some other secretive method on television. The alluring nature of secret rooms has captivated my imagination for as long as I can remember. Turn a closet into a hiding place with a basic bookcase, trimmed to match the room.