Synopsis: This appealing nonfiction picture book from Washington Post/Children’s Book Guild Award winner Gail Gibbons introduces young readers to the excitement of real-life treasure hunts.A rotting hull of a ship...lost gold...coins...gems...sunken treasure!Treasure hunting is a big business. Searchers use metal detectors and sonar to locate treasure on the ocean floor. Divers use high-powered machinery to uncover objects buried in the sand and to raise…