Whistling in the Dark by Shirley Hughes

Liverpool, 1940: thirteen-year-old Joan’s home is under threat from the Nazi’s terrifying nightly air-raids. It is not an easy time to be a teenager, especially with the sweet rationing, strict curfews and blackouts. Joan and best friend Doreen love going to the cinema until the bombings intensify and then even that becomes too dangerous, especially when an army deserter is found lurking near their home. Who is he and why does he think Joan can help him? As the Blitz worsens, Joan and her friends make a discovery that will tear the whole community apart.