In "The Devil in the White City," Erik Larson explores the intricacies of the 1893 Chicago World's Fair, weaving together the stories of its architects and the dark events surrounding the period. The library, a prominent structure in the fair's design, embodies the creative spirit of the time, filled with hope and innovation amidst a backdrop of societal challenges. As the sun set, the atmosphere transformed, illuminated by gas jets, which added a unique ambiance reminiscent of a living creature reacting to its environment.

This vivid description of the gas jets hissing like annoyed cats paints a picture of the atmosphere within the library. It reflects the tension and excitement of the fair, mirroring the fierce competition among architects while contrasting with the dark narrative of murder that unfolds nearby. Through this imagery, Larson captures both the beauty and chaos of the era, showcasing how architectural brilliance coexisted with underlying sinister forces, setting the stage for a gripping historical tale.