Hornet Flight — Ken Follett

It is June 1941 and the war is not going well for England. Somehow, the Germans are anticipating the RAF's flight paths and shooting down British bombers with impunity. Meanwhile, across the North Sea, eighteen-year-old Harald Olufsen takes a shortcut on the German-occupied Danish is-land of Sande and discovers an astonishing sight. He doesn't know what it is, but he knows he must tell someone. And when he learns the truth, it will fall upon him to deliver the word to England--except that he has no way to get there. He has only an old derelict Hornet Moth biplane rusting away in a ruined church: a plane so decrepit that it is unlikely ever to get off the ground . . . even if Harald knew how to fly it.