Night of the Fox — Jack Higgins

On a secret sea maneuver just before D-Day, American Colonel Hugh Kelso goes down in the English Channel. Wounded and adrift for days, he washes ashore on the German-occupied island of Jersey. The news spreads panic through the Allied high command: Kelso knows the time and place of the invasion. Now he must be rescued or silenced.

A British professor turned Nazi impersonator and a young Jersey girl posing as his French mistress set off to find Kelso in the fiercely guarded island fortress. In a deadly, twisting game of wits, they must succeed...or perish.