How is the Tree City described in the novel, Moon Chosen?

The Tree City is described as a large, intricate city that hangs high in the trees and is connected by a series of bridges and walkways. It is decorated with many mirrors to add optimal sunlight to the city, because the Companions thrive in sunlight. There is a large gathering place in the middle of the city where celebrations and ceremonies are held. There is also a hospital that cares for both humans and dogs, because there is no distinction made between the value of their lives.