There's also Captain Corelli's Mandolin by Louis De Bernieres.
From Amazon:
It is 1941 and Captain Antonio Corelli, a young Italian officer, is posted to the Greek island of Cephallonia as part of the occupying forces. At first he is ostracised by the locals, but as a conscien-tious but far from fanatical soldier, whose main aim is to have a peaceful war, he proves in time to be civilised, humorous - and a consumate musician. When the local doctor's daughter's letters to her fiance go unanswered, the working of the eternal triangle seems inevitable. But can this fragile love survive as a war of bestial savagery gets closer and the lines are drawn between invader and defender.
The Boy in the Striped Pyjamas by John Boyne.
From Amazon:
Lines may divide us, but hope will unite us ...Nine-year-old Bruno knows nothing of the Final Solution and the Holocaust. He is oblivious to the appalling cruelties being inflicted on the people of Europe by his country. All he knows is that he has been moved from a comfortable home in Berlin to a house in a desolate area where there is nothing to do and no one to play with. Until he meets Shmuel, a boy who lives a strange parallel existence on the other side of the adjoining wire fence and who, like the other people there, wears a uniform of striped pyjamas. Bruno's friendship with Shmuel will take him from innocence to revelation. And in exploring what he is unwittingly a part of, he will inevitably become subsumed by the terrible process.
Lovely Green Eyes by Arnost Lustig.
From Amazon:
Fifteen-year-old Hanka Kaudersova has ginger hair and clear, green eyes. When her family is deported to Auschwitz, her mother, father and younger brother are sent to the gas chamber. By a twist of fate, Hanka is faced with a simple alternative: follow her family, or work in an SS brothel behind the eastern front. She chooses to live, her Aryan looks allowing her to disguise the fact that she is Jewish. As the German army retreats from the Russian front, Hanka battles cold, hunger, fear and shame, sustained by her hatred for the men she entertains, her friendship with the mysterious Estelle, and her fierce, burning desire for life. Lovely Green Eyes explores the compromises and sacrifices that an individual may make in order to survive, the way a woman can retain her identity in the face of appalling trauma, and the value of human life itself. This is a remarkable novel, which soars beyond nightmare, leaving the reader with a transcendent sense of hope.
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It's interesting to see how diverse these books are, even though they are all set during the same period with the same major event as the central theme!