Eyeglass Island Library

Eyeglass Island Library is a place that exists in The Legend Of Zelda: Oracle of Ages. It appears in both the Past and Present.

Present (Before changing the past)
The Library is initially closed off. There is no way to enter unless one travels to the past.

Past
The library is initially locked on the outside. A key is required to unlock the door. The back houses a puzzle that requires an ancient book from the future/Present to complete it. Once completed, the mage situated in the middle of the room will give the player Fairy Powder/Dust.

Present (After opening in the past)
Inside their are two rooms; the front is full of books and Zoras/humans. The back houses a sage and the ancient book needed to complete the puzzle housed in the same room in the past.