The Mystery Bookshelf is is furniture item which is built out of 3 parts and where the final product contains a new secret room.
The bookshelf is built by leveling up and happens at the following levels:
- Level 122: Mystery Bookshelf 1/3
- Level 132: Mystery Bookshelf 2/3
- Level 146: Mystery Bookshelf 3/3
Mystery Bookshelf 3/3 is the final stage of the item and it's where the item is both place-able and enter-able. Only the player owning the bookshelf can open, close and enter the hidden room of their bookshelf. Other players will need to join the owner live to the room if they want to enter the hidden room. The hidden room can be decorated as any other normal room.