What is a flag? Noted poet Marvin Bell and award-winning illustrator Chris Raschka offer a whimsical investigation. We see all sorts of flags every day. But why do we have them, and what are they for? In a book at once playful and thought provoking, Caldecott Medalist Chris Raschka illustrates Marvin Bell's "A Primer about the Flag," a short poem that raises as many questions as it does flags. Whether brandishing flags that spell out...