Delaney is back! Chris Thompsons third novel is the long-awaited sequel to The Io Incident. Richard Delaney must return to Jupiter and face the unknown. What he finds is astonishing and more terrifying than anyone had ever imagined. A vessel of immense size and complexity emerges from the Jovian clouds. Crewed by machines that bring a messagea message that all life is about to become extinguished. Who can be trusted, and who must be sacrificed for the good of all? And why have they chosen him?