Note: This achievement is not gotten in the main game, but rather in the "Hall of fame" extra content!
To unlock this achievement, you need to find all five double sided pages in the "Hall of fame" section, which can be entered through the main menu.
1. In the starting corridor, turn left. This page hangs on the wall on the left.
2. In the starting corridor, turn left. This page lies on the floor near the back end of the corridor.
3. In the main room with the tree and the portraits. Turn right and interact with the portrait of the two bald men, and it'll fall down. The page will be on the back of the painting.
4. In the main room with the tree and the portraits. Move forward and turn left to face the third portrait from the door. Interact with it, and it'll fall down. The page will be on the wall behind where the portrait hung.
5. In the main room with the tree and the portraits. Immediately to the right of the door, in the corner, and right next to the portrait of the two bald men. The page is sticking out from the pillar.
Move to the stone plinth/altar with the book opposite of the door, and use all the pages on the book. The achievement will pop!