Heaven Cent (Xanth, No. 11)

Master magician Humphrey has disappeared, and Xanth's precocious shape-shifter, Prince Dolph, sets out to find him, accompanied by his skeletal sidekick, Marrow. Together, they embark on a series of adventures while searching for the fabled Heaven Cent, the magic coin that holds the secret to Humphrey's disappearance. The fabulous sequel to Vale of the Vole. Original.