Rose of No Man's Land by Anne Perry
Rosie is in trouble at school again - and only because she struggles with reading. When Rosie picks up an old watch in an antique shop, it transports her to a WWI Red Cross hospital. As a nurse she listens to the men's stories and meets Edith Cavell - who helps soldiers to escape from the Germans. When Rosie learns of Edith Cavell's arrest, she has to make a tricky decision - The second book in the brand new Timepiece series.