The Secret Library Quest/Spoiler

Method
Find Dedoras southeast of Cormaya, here. Talk to him to learn about the 6 puzzles you have to solve in order to gain access to the Secret Library.

High and Dry
To get this document, you'll have to shipwreck on a secret island. Talk to Charles in Port Hope and ask him for a shortcut passage to Edron. There is a chance that you'll end up in the secret island, where you'll find Sealed Scroll.

The Path of Defiances
Go to the dungeon west of Darashia, around here, and enter the sand vortex. There are 4 puzzles you must solve in order to receive special items which will be required for a ritual. Go out the building to the south, then walk around it to the west and go down the hole.

The first puzzle consists of walking an invisible path around a room towards a quest door, starting at the carpet. If you take a wrong step, Red Musical Notes will appear on your character and you'll have to start over.

The second puzzle consits of fighting through a horde of Skeleton Elite Warriors and Undead Elite Gladiators. You'll pass it simply by getting to the next room. Pick up a Ritual Stone Tablet in the room nearby.

The third puzzle will require you to step on the coloured carpets the correct amount of times, as shown just north of the lava pool. Step on the carptes the same amount of times they are shown to the right, starting at the center, then west and finally east. If you see red musical notes, you'll have to start over. Pick up a Ritual Sword in the room nearby.

The final puzzle is located in a room with Bonelord Statues. Please them by placing any Food on top of the tree southern stones and you'll be allowed through the next door. Pick up a Ritual Figurine in the room nearby.

After finishing all puzzles and obtaining all 4 ritual items, go back to the entrance at the upper floor and go up the long stairs west. Perform the ritual by using the items on the corresponding stones. You should now be able to go through the 4 doors just east of this same room.

Before entering the teleport, be ready for a fierce solo battle against a Furious Scorpion as well as 3 Skeleton Elite Warriors and 3 Undead Elite Gladiators. It's recommended that you first run to the west side of the room and pick up the document from the chest. You can use an Energy Bomb Rune to guard yourself from the summons and only take damage from the miniboss. Yet, be very careful since it can easily hit for over 1000 damage. You can fight this battle every 2 hours.

Enter the Magic Forcefield to leave the boss room and the dungeon.