Okay so I'm making this here hidden room thing, it's actually a 'gun vault' (a requisite for easy storage of firearms in Canada). Anyway, I've got it tucked away, and thinking of hiding the entrance behind a bookcase (basic ply construction, 5 shelves, on a hinge in front of the door opening, likely a caster on the bottom for weight). Any tips on a) construction of the swinging bookcase, and b) cool add-ons in the gun room?
Room will feature LED lighting (backlit on the most interesting guns), a motion sensing camera, a control panel (for lights), in-wall first aid kit (you never know what can happen). But it's small (6'x7') so it's not like I can get a TV in there

Any ideas for cool 'wow' items I can install? Walls are either concrete or a mix of wood, rebar, binder twine and concrete board. The actual door is a steel exterior door (with reinforced steel around the deadbolts).
This is where I'm at in designing. So far the room is built and the birch plywood is up (not stained). Not sure what the back wall is going to be made of, I'm not sold on the brick, might be too dungeon-y. Apologies to those that are anti-gun