The Medford Public Library presents an online program with author, professor and historian Kathleen DuVal to discuss her book, “Native Nations: A Millennium in North America.” Called “an essential American history” by The Wall Street Journal, the book places the power of Native nations at its center, telling their story from the rise of ancient cities more than a thousand years ago to fights for sovereignty that continue today. A question-and-answer period will be included. Register through the library’s online calendar to receive the Zoom link.