Pilot officer Archie Jackson, 19, is in control of the RAF's newest fighter aircraft, a Supermarine Spitfire. Now he has the Luftwaffe in his sights and only one thing matters: defending Britain. Suddenly planes are falling from the sky, exploding and spiralling into the English Channel. France has fallen and the swastika flies over Occupied Europe. Only these young pilots - barely out of boyhood - stand between Britain and a Nazi invasion . . . Duty Calls: Battle of Britain, throws you deep into the heart - and horror - of Britain's darkest, and finest, hour. ** Historian James Holland is the bestselling author of the Jack Tanner adult war fiction books. Duty Calls is his first series for younger readers, and showcases his expertise on the Second World War. ** James Holland presented Battle of Britain: The Real Story on BBC2.