Sweet Sorrow

Only weeks after the mysterious death of Lord Kitchener, British intelligence uncovers evidence that Germany's hidden war is entering a dangerous new phase.

Across Europe and America, spies, saboteurs and diplomats work in the shadows, while behind seemingly ordinary shipments a far more sinister plan is taking shape. Modern science is being harnessed to transform one of mankind's oldest weapons into an instrument of industrial warfare.

Drawn once more into the conflict, intelligence officer ...