Because going back to the library is a key process after going back to the police station, I personally feel that the probability of the library being harassed by the tyrant is extremely high. This also brings some troubles and inconveniences to the bookcase. In particular, sometimes I hope to drive the tyrant away through a big circle in other rooms, but when you come back, I find him waiting for you at the library gate, which not only can't get rid of it, but also delays more time.
A small idea provided here is to use the tyrant's slow driving speed, the double-decker space of the library and the judgment problem of the tyrant's identification path to turn around in the room and get rid of the tyrant intermittently.
First, attract the tyrant to the bookcase, quickly climb the vertical steel ladder next to him, and then quickly return to the bookcase through the stairs. Because of the problem of judgment, as long as you climb the steel ladder, the tyrant must chase you in the same way as you climb the steel ladder, instead of blocking you on the other side. You distance yourself from the tyrant by running quickly after climbing the stairs. Drag the bookcase quickly after returning to it. If the speed is fast, it only takes two laps to complete the task.
Never choose to take the stairs to attract tyrants and then climb down the vertical steel ladder to bypass them. Because the tyrant walked slowly, but fell directly on the steel ladder, and Claire came down from the steel ladder slowly, shortening the time difference, and the steel ladder fell into the bookcase, which was often very dangerous.
After the bookcase is completed, go directly to the corridor on the third floor through the stairs. Although the tyrant will chase, it is safe to enter the bell tower smoothly as long as you are careful of the zombies on the road. Never try to run to the storage room on the third floor to bypass the tyrant, because when you return to the police station, you will brush it again and lick it. It's hard to be caught between two sides.