What does the book, "Cloud Cuckoo Land" symbolize in the novel by the same name?

The book, or the folios of Diogenes's Cloud Cuckoo Land, symbolizes imagination. Though Diogenes's ancient text only exists in fragments, each of its readers infuse it with new meaning and emotional resonance. The book not only connects all of the characters, but binds their distinct and collective consciousnesses into one comprehensive and thus expansive tale.