Outstanding fast paced world war II espionage/ spy thriller from Ken Follett.
Eighteen year old Harald Olufson a bright kid with a lot of potential and likes to tinker with machines and engines. One day while returning home he does a short cut through an army camp of Nazis in the island of Sande to find some unusual kind of disc like equipment.
Meanwhile there is an underground Danish resistance movement against the Nazis a secret group called Nighwatchmen involving a group of Danish men and women. The British were losing a lot of their fighters due to German technical air superiority and a radar system which the British did not have at that time. Hermia Mount is the British officer directly involved in this espionage activity. She has a Danish boyfriend and speaks Danish language well, having lived there for many years.
Their main goal is to take photograph of the radar system of the Germans so that British can work on it to prevent their losses. Paul Kirke is the Danish air force commander who gives Harald his first flying lesson in a Tiger Moth airplane. Karen Duchwitz is a ballet student and her parents are Jewish and own a property in Sande, which includes an old disused Hornet Moth.
How Harald and Karen risk their lives to fly the photographs across 600 miles into Britain against some unrelenting Nazi fire is the rest of the story. Goodreads 5/5