When all sorts of accusations, denials, revelations, disclosures, and leaks are swarming and spilling around the security agencies of the United Kingdom and the USA, it is worse when the Snowden effect erupts. A bruised and slightly disillusioned Commander Elaine Black, training officer and senior security advisor at GCHQ Bude Listening Facility, is plunged into a bewildering and dangerous battle to make sense of and counter a desperate threat to British Security. Headless bodies, fire bombings, threats of chemical warfare unloosed on a small West Country town, apparently straightforward...