From the blurb: "The day the First World War began, Alfie Summerfield's father promised he wouldn't go away to fight - but he broke that promise the very next morning. Four years on, his letters have stopped, and all Alfie knows is that he is very far away on a secret mission.
Then, while shining shoes at King's Cross Station, Alfie unexpectedly spots his father's name on a stack of papers belonging to a military doctor. Bewildered and confused, Alfie realizes that he's a patient in a hospital close by - a hospital treating soldiers with an unusual condition. And he's determined to rescue his father from this strange, unnerving place...'
