Part of a stunning new design partnership between Puffin and the Imperial War Museum, this is an unforgettable story from the bestselling author of The Boy in the Striped Pyjamas. This special edition features a foreword from Eoin Colfer. The day the First World War broke out, Alfie Summerfields father promised he wouldnt go away to fight – but he broke that promise the following day. Four years later, Alfie doesnt know where his father might be, other than that hes away on a special, secret mission. Then, while shining shoes at Kings Cross Station, Alfie unexpectedly sees his fathers name – on a sheaf of papers belonging to a military doctor. Bewildered and confused, Alfie realises his father is in a hospital close by – a hospital treating soldiers with an unusual condition. And Alfie becomes determined to rescue his father from this strange, unnerving place . . .