"Smart Girl" by Lucy Bethia Walford is a fascinating story about a girl named Emily, who lives in a small village in the south of France. Her curiosity about the world around her and her tenacity in learning new things simply have no limits. One day, Emily decides to investigate the mystery of an ancient castle located in the forest near the village. This journey will lead to a series of incredible adventures, meeting interesting characters and solving mysterious puzzles. "Smart Girl" is a book that teaches us to believe in ourselves, overcome obstacles and always strive for new knowledge.