A missing diamond. A famous smile.A mystery hidden in the heart of Paris.When art historian Grace Whitmore lands in the City of Light for what should be a quiet research trip, she's swept into a world of secrets, theft, and deception inside the Louvre Museum. A cryptic message, a shadowy figure at a café, and whispers of a lost gem buried in art history lead her deep into the city's underworld-from glittering galas to the ghostly catacombs below.Can Grace solve the riddle behind one of the world's most iconic paintings before time runs out?The Diamond Behind Mona Lisa's Smile is a fast-paced mystery filled with charm, intrigue, and the unforgettable magic of Paris.