This spring, Mac Barnett, the award-winning children’s author of such contemporary picture-book classics as Sam and Dave Dig a Hole, dug himself a hole. In Make Believe: On Telling Stories to Children, his new book-length work of literary criticism about children’s books, he makes a forceful argument for adults to take children seriously as readers. Their sense of taste, their sense of justice, their sense of imagination. Too many children’s books, he suggests, condescend to their readers. The b