Kidnapped At Birth? (Marvin Redpost, No. 1): Louis Sachar

This chapter book series by Newbery Honor-winning and bestselling author Louis Sachar features one hilariously overactive imagination!
Marvin Redpost has never felt like he fits in with his family. So when he hears a news report about a missing prince who looks just like him, he knows exactly what happened. Now all he has to do is tell Mr. and Mrs. Redpost that it's time for him to move in with his real parents at the castle….
Hilarious and relatable, Marvin Redpost is perfect for kids who love to bond with quirky characters like Junie B. Jones and George Brown, Class Clown.