Mr. Merlin's Third Graders are known as the Third Grade Detectives--with some hints from secret code clues and help from Mr. Merlin's friend, the police scientist Dr. Smiley, they help solve cases. Perfect for fans of the Hardy Boys The Third-Grade Detectives are looking forward to their field trip to a local art museum, where a priceless 15th-century statue of Joan of Arc is on loan from a Paris museum. But when they arrive, they...