Kidnapped At Birth?

Summary: Illus. in black-and-white. Marvin Redpost has finally figured out why he doesn't look like anyone in his family. He's not really Marvin Redpost--he's Robert, the lost prince of Shampoon! "The story is wonderfully logical and absurd, with a wit and attention to detail rare in an easy reader."--Bulletin, Center for Children's Books. "Fast paced, easy to read, and full of humor."--School Library Journal.