Mission to Save 50 Million People

Henry has proven that time travel works, He now wants to go back to stop Hitler in whatever way he can and so to stop the Second World War. The question is whether it is possible to change history or whether the fact that Henry was there means that what he did is already part of the fabric of time. Can the implementation of free will change what happens?

The question is: how does a civilised modern man cope when he is thrown into the most vicious and deadly war of the twentieth century? This is the story of an ordinary person trying to change the course of history whilst also being forced along with it into places he did not want to go.