Upon entering, visitors are drawn to the impressive wall of books that hangs in front of an expansive deep blue background. The columns in the central space not only support the structure but also provide heating and ventilation, and illuminate the continuous metal ceiling that flows across all spaces.
Daylight enters the building through the climate-controlled glass facades, as well as through the cone whose base forms the focal point of the central space. Moreover, the cone shapes different reading rooms on the upper floors.
According to wikipedia