A con artist in Paris

"The Hardy Boys are visiting Paris! Joe is excited to check out all the street art he's heard about. And Frank can't wait to go to all the museums he's researched. On their very first day in the city, the brothers are woken up early in the morning by fireworks. But these are no ordinary fireworks. They are a part of elaborate cover for the heist of a priceless artifact. What's worse, the theft seems to have been orchestrated by Joe's favorite street artist, an unidentified outlaw and activist that goes only by the name Le Stylo. Everyone seems sure that it's him, but the Hardys are suspicious. From everything they know about Le Stylo, the crime is out of character. Sure, he makes a habit of provoking the authorities, but he's an activist; not a thief. Could the artist known for his mystique have been framed? Frank and Joe are determined to find out"--