If a denizen kills a human, is it murder? The death of a Moon colonist, seemingly at the hands of a robot worker, starts a series of events that could jeopardise all human society in space. Lee Sands races to uncover what WorldGov is hiding before more people die. What are the secret experiments they are conducting on Moonbase Seven and why are they so desperate for Lee to go there? Could the denizens finally be waking up? Denizen 43 is an action-packed, hard science fiction mystery set in the world of the Panopticon - where everything is observed and nothing is as it seems.