New York Times bestselling author James Swallow's The Marc Dane series continues with ShadowA ruthless far-right terrorist has broken out of captivity.A mysterious bio-scientist with a terrible secret is abducted.A lethal virus threatens millions of lives across Europe and the Middle East.Ex-MI6 officer Marc Dane and his partner, Lucy Keyes, are bound together in a desperate search for the sinister organization plotting the release of a deadly virus on the world. In their frantic race against time, Dane and Keyes will be tested more than ever before as they seem to find themselves one step behind at every turn. It will take everything they have to expose the evil forces lurking in the shadows and put a stop to this unstoppable pathogen ... and even everything might not be enough.What price would you pay to stop a global catastrophe?