The Berlin Principle - J. G. Jenkinson - Bog

A scientist in East Berlin. A young woman in dystopian Britain. A soldier in the Kaisers army.
One lives in regret, one lives in ignorance and one lives in fear that each day will be his last.
Each will be betrayed, their worlds torn down around them.
Each will change the course of history.
And each somehow knows that this is not the first time they have lived this life.