Our Castle by the Sea by Lucy Strange - an exciting novel set on England's southeast coast during WWII

Title: Our Castle by the Sea
Author/Narrator: Lucy Strange
Publication: Scholastic, audiobook/paperback, 2019
Genre: Juvenile Historical Fiction
Setting: WWII Britain

Description: Petra Smith and her family live on the southeast coast of England; her father is the lighthouse keeper and they have been very happy until war begins. Then Petra’s older sister Magda starts getting into fights, defending their German-born mother, and becomes secretive.