1. After entering the library first, go to the northernmost library and talk to slime. slime will give a hint to solve the maze of the library and guide the first switch around.

2. Secondly, after starting the first switch, it is suggested that all the switches in the library can be used to walk around and read the little red book with the treasure chest. When you reach the lower right corner, you will see the second switch. After you open it, the door in front of you opens and you get to the second floor. On the way, you will meet Yorkshire people and open a new Yorkshire adventure book.

3. Then, after coming out of the second floor, if you want to walk around with your treasure chest and forged books, you can read the little red book while holding the treasure chest. There is a bridge connecting the east and west of the map. Cross the bridge and there is a third switch in the library. After opening, a bridge from the second floor to the third floor will be erected.

4. Finally, the third layer is the same method. Go downstairs from the northwest corner of the fourth floor to the northwest corner of the third floor, go out of the room and enter the northernmost library, turn on the switch inside, and connect the east stairs with the final destination.