Flat Stanley by Jeff Brown. Read-Aloud edition. 1992. Hardcover (Ch-FIC)

When Stanley Lambchop wakes up one morning, his brother, Arthur, is yelling. A bulletin board fell on Stanley during the night, and now he is only half an inch thick! Amazing things begin happening to him. Stanley gets rolled up, mailed, and flown like a kite. He even gets to help catch two dangerous art thieves. He may be flat, but he's a hero.