Britain is under attack on two fronts. The IRA is mounting a bombing campaign on the mainland, and agents of the German Secret Service are collecting vital information to help them if war breaks out.
Investigative journalist Roger Martin unearths a link between the IRA and Nazi Germany and, with the help of two teenage boys and Scotland Yard's Special Branch, uncovers two plots which threaten Britain's preparations for war.
Meanwhile, Roger discovers that the Gestapo are blackmailing a young Jewish girl who has come to England through the Kinder Transport and is working in the service of a senior Foreign Office Diplomat. A daring operation is mounted to rescue her parents from under the noses of the Gestapo in Berlin.
The Summer of '39 is a tale of spies, terrorists and blossoming young love-an epic adventure set in the final months of peace before WWII.