The precarious equilibrium among four londons has reached its breaking point. Once brimming with the red vivacity of magic, darkness casts a shadow over the maresh empire, leaving a space for another London to rise. Kell...The precarious equilibrium among four londons has reached its breaking point. Once brimming with the red vivacity of magic, darkness casts a shadow over the maresh empire, leaving a space for another London to rise. Kell - once assumed to be the last surviving - begins to waver under the pressure of competing loyalties.