In a story loosely based on The Pied Piper of Hamelin, an elf acquires from a miserable witch a magic pipe that allows him to transform things, including the mean-spirited Grand Duke who rules over a rat-infested town. Interest Level: K-3 Reading Level: 5.0 ATOS Book Level: 4.3 AR Interest Level: LG AR Points: .5 AR Quiz: 129913EN.