When fourteen-year-old Hazel and her younger sister Flora leave London as a part of Operation Pied Piper, Hazel makes up a fantasy world called Whisperwood to distract Flora from the harsh realities of war. Soon after evacuating, Flora goes missing and is presumed dead. Twenty years later, Hazel works in a bookstore and comes across a book about a place called Whisperwood. Is Flora alive? This unputdownable novel seamlessly blends historical fiction, mystery, and fantasy, and is absolutely enchanting.