The secret door that is disguised as a bookshelf is now a fully functioning bookshelf.
WHERE YOU CAN FIND IT:
you can find this in the door's area in build mode. It can also be found in the Custom Content section in categories.
This is base game combatable
It costs 350 Simoleans each... WHAT A DEAL
The more modern book shelf door can also be found in the doors area in build mode and custom content.
It costs 300 Simoleans each
This is a Maxis Recolour which means that it is a recolour of an item that already exists in your game. Please check the Pack requirements to see which game pack it recolours.