New York Times best-selling author and journalist Sam Quiñones tackles one of the most serious challenges the US faces today in his new book, "The Least of Us: True Tales of America and Hope in the Time of Fentanyl and Meth." (1:02) Writer Linda McGurk presents, "The Open-Air Life: Discover the Nordic Art of Friluftsliv and Embrace Nature Every Day." (27:45)