Once through the door against the southern wall, players will find the Unicorn Statue on their left. There is one feeding zombie and three dead bodies that are about to turn on the lower library level, so be cautious with your movements so as not to aggravate too many enemies at the same time.
Players will want to descend to the lower floor of the library, but instead of using the club key to head back to the main hall, head to the door at the southern end of the room, by the bottom of the large staircase. After navigating through the third-floor west corridor for the first time and entering the library, players will get a radio communication from Marvin stating that the player needs to get back to the main hall immediately. The second medallion players can get their hands on is located in the Lounge on the second floor.