Enlarge the door trap of the wooden door.

Remove the screws with the spanner to get the iron rod.

Move to the elevator side and enlarge the painting adorning the left side.

Enlarge the left end of the painting and remove the 2 bolts with the spanner.

Open the painting and get the crank handle.

Open the elevator door and move to the door at the back.

Insert the crank handle into the device on the right side of the door and turn it to open the door.

Enlarge the inside of the door and get the book.

Next, get the coin dropped on the left end.