"The Mystery Girl" is an exciting book by the famous American author Carolyn Wells. This novel tells the story of a mysterious girl who appeared in the life of a young aristocrat under a false name. Her mystery, beauty and mysterious past fascinate the main character, and he promises to discover the truth about her origin. However, the more he manages to uncover the secret, the more he risks becoming a victim of the discovery of a truth that could throw his entire world off balance. "The Mystery Girl" is an exciting story about love, loyalty and secrets that will keep you in suspense until the last page.