Are picture books undervalued? Our new 'ambassador' of children's books thinks so

Picture book author Mac Barnett (who often works with illustrator Jon Klassen) has been named the Library of Congress' new ambassador for young people's literature. We talk with Barnett about what it means to be named to this role in this moment, when engaging kids in reading can be a struggle, and when there are more challenges to what kids are free to read.