Home-grown terrorists equipped by a foreign power are not a new phenomenon. During the Second World War, Hitler’s Germany made sustained efforts to inflict a terror campaign on the streets of Britain through the use of secret agents and agents provocateurs. The aim was to blow up military, industrial, transport and telecommunication targets, to lower morale among the civilian population and disrupt the war effort.

Even before the outbreak of war, the Nazis provided the IRA with assistance for their plan to sabotage the British mainland. Prior to their planned invasion in the summer of 1940, the Nazis were also keen to recruit members of the Welsh and Scottish Nationalist Parties to engage in sabotaging British targets and, over the course of the war, infiltrated dozens of trained agents from countries including Norway, Denmark, Holland, France and Cuba.

What happened to the myriad plots to blow up Britain? We know that intelligence obtained from decrypted enemy messages via Bletchley Park and double agents like ZIGZAG, SUMMER and TATE alerted MI5 to some of these spies’ arrivals, but what about the others? And how successful were MI5’s efforts to fake acts of sabotage and arrange media coverage to fool the enemy into thinking their agents were still at large and on task? In this book, Bernard O’Connor, a noted wartime espionage historian, tells the complete story of the successes and failures of the Nazi terror offensive on mainland Britain during 1938–1944.

• First comprehensive history of Hitler's entire sabotage campaign in mainland Britain during WW2.
• Interest in the wartime British Secret Service has never been more intense. See the success of the life story of fellow SOE Agent Zigzag, Eddie Chapman. Agent Zigzag was a Number 1 bestseller for author Ben Macintyre and the story has been optioned by New Line Cinema with Tom Hanks co-producing. 
• Reviews in the history interest press, national weeklies, national daily and Sunday newspapers, to include: BBC History Magazine, The Mail on Sunday and The Times, TLS and The Spectator.