The Main building was filled with halls.
Halls after halls after halls.
Every single door he entered led to a different world of its own, and the majority of these worlds were covered in golden light—something that almost made him as clear as day—but he was still able to avoid being seen by confirming no one was in the hall with his ability to hear, and also making sure no one was close enough.
There was no avoiding one hall due to fear of being seen, or he risked missing the location of the Chosen book.
This went on for about 2 hours before, finally, he found a door to a hall that arrested his attention.
The door itself had a drawing of an open book, with runic symbols sketched in the book illustration.
'This has to be it,' he silently prayed in his heart, standing in a corner for some time to make sure the guards were still far away, and no unexpected passing happened in the corridor.
He moved closer and gently pushed the door open.