" The silence of the library was complete save for the thudding of his shoes as he walked along the second-floor hallway. Outside, there were birds sometimes and, even lacking that, there seemed to be a sort of sound outside. Inexplicable, perhaps, but it never seemed deathly still in the open as it did inside a building.
Especially here in this giant, gray-stoned building that housed the literature of a world's dead. "

― Richard Matheson , I Am Legend