Paper Swallow, statue in Klementinum, Prague

The Clementinum is a former Jesuit college. It is opposite Charles Bridge in the Old Town. Now there is the National Library.
This plastic statue is a figure from a favorite book. Sitting on the sill of the library's technical library building.
What does the statue say? That, in the digital age, the books are only suitable for the production of paper swallows?
I do not know. I do not even know if the paper thing that flies in English also says swallow ...