"Letters from the Lighthouse" is a historical novel by Emma Carroll set during World War II. The story follows two sisters, Olive and Clara, who are evacuated from London to a coastal village. They discover a mysterious letter that leads them on an adventure filled with secrets and bravery. As they navigate their new surroundings, the sisters encounter various characters, including local villagers and soldiers, who help them understand the impact of the war. The novel explores themes of family, friendship, and resilience in the face of adversity, making it a poignant read for young audiences.