Isaac Bell returns for another white-knuckled mission in a new installment of the thrilling series

1917, France- Sent by the US President to act as an observer, Detective Isaac Bell is soon caught up on the war's front line.
Shot down behind enemy lines, he is taken prisoner in a medieval chateau, facing execution unless he can escape.
With him are other captured Allied airmen and gunners. But can they break out of a fortress guarded by the latest German military technology - the armoured tank?
The US President is relying on Bell. Bell knows he mustn't fail. Because a secret anarchist plot is in play to bring down America.
And only Isaac Bell can stop it . . .