SOULLESS Book 2. Many generations ago, strangers offered up their lives and their gifts to protect the Wall from a violent enemy. Over time, the Machine planted its roots inside of cracks in the stone, its eyes opened, and new Angels raised to take up the mantle of their ancestors, as protectors of all those under the city's watchful gaze. But the Machine must be destroyed, the Wall must fall, and it will be the Angels left to turn treasonous.