“Black Book Untold Legends” is the Side quest in Skyrim - Dragonborn
- Learn the Black Book's hidden knowledge
Head down the stairs in front of you and turn to the right. Follow it down to the bottom and go to the left. You can find some some soul gems to the right of the bottom of the stairs.
Turn to the North from the table with the Soul Gems. Go down the stairs and you will find the next book that leads you to chapter 2.
Go forward and over to the West. Going through the archways you will need to deal with a Lurker
This will bring you to a split in the path. Going on the path to the North will take you to Chapter III.
Going to the South will bring you Chapter IV.
Just in front of you is a table. You will find another Soul Gem and a pod you can loot. Be on guard because you will need to fight a pair of Seekers.
On the table, on the front right-hand, you will find Spell Tome: Conjure Seeker.
Collect the book and return to the book behind you. This will bring you back into Chapter II.
Go straight forward to the South. Head on through the hallway until it opens up.
The courtyard you are in has a few wandering Seekers in it. There are alcoves all around this large room where you can sometimes find a Fonts of Magicka and Stamina. There are also pods that are going to have books in them. Take your time dealing with the Seekers. They can be deadly if you are dealing with multiple ones.
To progress forward, head to the middle alcove on the right-hand side. You will see a scrye. Activate it to open the gate in front of you.
Inside this alcove you will find another scrye. Approach and interact with it. This will open up another gate on the opposite side.
Go across to the Eastern side of the room. Opposite where you just were is another scrye to activate. This will open the cage in the middle of the room.
In the middle of the room you will find another scrye in the cage you just opened. Interact with it to open the gates to the South.
Go up the stairs and through the newly opened gates
This will lead you to another book. Read it to go into Chapter V.
This is the final chapter of the book. Go to the South when you arrive and head straight down the hallway. At the end of the hallway to the South is the Black Book.
Open the book and inside you will be able to to choose one of the three powers the Untold Legends.