When Flat Stanley is asked to help catch an art thief in Paris, he’s thrilled! Posing as a painting on a wall across from the famous Mona Lisa?—c’est magnifique! But Stanley soon grows bored—until he meets Etoile, an art student who shows him around the City of Light. When Stanley goes back to the museum, he quickly realizes that the Mona Lisa looks . . . different. It’s been switched for a fake! Will Stanley be able to nab the thief before he or she strikes again?
