Today's guest, Jeffry Wert, is a historian and author who specializes in the American Civil War. He's written nine books about the Civil War. His book, Gettysburg--Day Three, was nominated for a Pulitzer Prize and National Book Award. Wert also taught at Penns Valley Area High School for more than three decades. WPSU's Kate Lao Shaffner talked with him about his career as an author and teacher.