The Key Of The Unknown is a novel written by Rosa Nouchette Carey. The book tells the story of a young woman named Hester who is forced to leave her childhood home after her father's death. She moves to London to live with her uncle and aunt, but finds it difficult to adjust to her new surroundings.As Hester tries to find her place in the world, she meets a mysterious man named Philip, who seems to hold the key to her past. With Philip's help, Hester...