After you discover the last clue from Library: You find a secret passage. Choose any location and place 1 horror token on it, as a secret passage. For the remainder of this scenario, each copy of Library is connected to the location with a secret passage, and vice versa. (Max once per game.)

Massive. Cannot make attacks of opportunity.

Living Library gets +1 health.

Forced - When this enemy-location is revealed: Each investigator at this location and each connecting location takes 1 horror.