Iron Door

The Iron Door is an object featured in . Situated just outside of the Cavern, can only open the door if she has the in her possession, allowing her to access the cavern and eventually receive the from the .
If Zelda does not have the with her, Zelda will slump to the ground, trying to decide what to do but is then attacked by a . The book ends with a Game Over with Zelda screaming for help.
The book offers a puzzle which will help the reader see the item that Zelda will need while inside the cavern. When the puzzle is solved, it will spell out the words "."