Prison Without Bars
Frank Keiller was thirteen and living in Jersey when the Germans occupied the Channel Islands in 1940. During the ensuing five years he shared the various hardships common to his fellow Islanders. Moreover, he and his friends felt a particular sense of frustration at being forced to grow to maturity in what they felt was a 'prison without bars'. Such strong feelings led him into various encounters with the enemy - he punched a German soldier in the face when, in 1942 and on Hitler's orders, 'English' residents were deported. After D-Day, he attempted with others to reach the French mainland but failed after their highly unsuitable craft sank beneath them. He was court - marshalled twice but on both occasions avoided the death penalty. During his imprisonment he escaped and spent the rest of the Occupation on the run in Jersey.
and yes there were collaborators.